390865097 has 4 divisors (see below), whose sum is σ = 446702976. Its totient is φ = 335027220.

The previous prime is 390865091. The next prime is 390865133. The reversal of 390865097 is 790568093.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 390865097 - 2²⁶ = 323756233 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (390865091) 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, 27918929 + ... + 27918942.

It is an arithmetic number, because the mean of its divisors is an integer number (111675744).

Almost surely, 2^390865097 is an apocalyptic number.

It is an amenable number.

390865097 is a deficient number, since it is larger than the sum of its proper divisors (55837879).

390865097 is an equidigital number, since it uses as much as digits as its factorization.

390865097 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55837878.

The product of its (nonzero) digits is 408240, while the sum is 47.

The square root of 390865097 is about 19770.3084700265. The cubic root of 390865097 is about 731.1541740942.

The spelling of 390865097 in words is "three hundred ninety million, eight hundred sixty-five thousand, ninety-seven".