390674569 has 4 divisors (see below), whose sum is σ = 413655444. Its totient is φ = 367693696.

The previous prime is 390674551. The next prime is 390674587. The reversal of 390674569 is 965476093.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (390674551) and next prime (390674587).

It can be written as a sum of positive squares in 2 ways, for example, as 153884025 + 236790544 = 12405^2 + 15388^2 .

It is a cyclic number.

It is not a de Polignac number, because 390674569 - 2⁹ = 390674057 is a prime.

It is a super-2 number, since 2×390674569² = 305253237726671522, which contains 22 as substring.

It is a Smith number, since the sum of its digits (49) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (390674509) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11490412 + ... + 11490445.

It is an arithmetic number, because the mean of its divisors is an integer number (103413861).

Almost surely, 2^390674569 is an apocalyptic number.

It is an amenable number.

390674569 is a deficient number, since it is larger than the sum of its proper divisors (22980875).

390674569 is a wasteful number, since it uses less digits than its factorization.

390674569 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22980874.

The product of its (nonzero) digits is 1224720, while the sum is 49.

The square root of 390674569 is about 19765.4893438033. The cubic root of 390674569 is about 731.0353539143.

The spelling of 390674569 in words is "three hundred ninety million, six hundred seventy-four thousand, five hundred sixty-nine".