390340193 has 4 divisors (see below), whose sum is σ = 391294980. Its totient is φ = 389385408.

The previous prime is 390340163. The next prime is 390340219. The reversal of 390340193 is 391043093.

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

It can be written as a sum of positive squares in 2 ways, for example, as 314423824 + 75916369 = 17732^2 + 8713^2 .

It is a cyclic number.

It is not a de Polignac number, because 390340193 - 2²⁶ = 323231329 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (390340103) 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, 476780 + ... + 477597.

It is an arithmetic number, because the mean of its divisors is an integer number (97823745).

Almost surely, 2^390340193 is an apocalyptic number.

It is an amenable number.

390340193 is a deficient number, since it is larger than the sum of its proper divisors (954787).

390340193 is an equidigital number, since it uses as much as digits as its factorization.

390340193 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 954786.

The product of its (nonzero) digits is 8748, while the sum is 32.

The square root of 390340193 is about 19757.0289517427. The cubic root of 390340193 is about 730.8267314712.

The spelling of 390340193 in words is "three hundred ninety million, three hundred forty thousand, one hundred ninety-three".