390475247 has 4 divisors (see below), whose sum is σ = 390715416. Its totient is φ = 390235080.

The previous prime is 390475231. The next prime is 390475249. The reversal of 390475247 is 742574093.

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

It is a cyclic number.

It is not a de Polignac number, because 390475247 - 2⁴ = 390475231 is a prime.

It is a super-2 number, since 2×390475247² = 304941837039422018, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (390475249) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 117629 + ... + 120902.

It is an arithmetic number, because the mean of its divisors is an integer number (97678854).

Almost surely, 2^390475247 is an apocalyptic number.

390475247 is a deficient number, since it is larger than the sum of its proper divisors (240169).

390475247 is a wasteful number, since it uses less digits than its factorization.

390475247 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 240168.

The product of its (nonzero) digits is 211680, while the sum is 41.

The square root of 390475247 is about 19760.4465283556. The cubic root of 390475247 is about 730.9110081219.

The spelling of 390475247 in words is "three hundred ninety million, four hundred seventy-five thousand, two hundred forty-seven".