390623977 has 4 divisors (see below), whose sum is σ = 413601876. Its totient is φ = 367646080.

The previous prime is 390623957. The next prime is 390623999. The reversal of 390623977 is 779326093.

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 302620816 + 88003161 = 17396^2 + 9381^2 .

It is not a de Polignac number, because 390623977 - 2¹¹ = 390621929 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (390623917) 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, 11488924 + ... + 11488957.

It is an arithmetic number, because the mean of its divisors is an integer number (103400469).

Almost surely, 2^390623977 is an apocalyptic number.

It is an amenable number.

390623977 is a deficient number, since it is larger than the sum of its proper divisors (22977899).

390623977 is a wasteful number, since it uses less digits than its factorization.

390623977 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22977898.

The product of its (nonzero) digits is 428652, while the sum is 46.

The square root of 390623977 is about 19764.2094959551. The cubic root of 390623977 is about 731.0037964150.

The spelling of 390623977 in words is "three hundred ninety million, six hundred twenty-three thousand, nine hundred seventy-seven".