390513977 has 6 divisors (see below), whose sum is σ = 454271418. Its totient is φ = 334726224.

The previous prime is 390513943. The next prime is 390513997. The reversal of 390513977 is 779315093.

It can be written as a sum of positive squares in only one way, i.e., 211382521 + 179131456 = 14539^2 + 13384^2 .

It is not a de Polignac number, because 390513977 - 2¹² = 390509881 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (390513997) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 3984788 + ... + 3984885.

It is an arithmetic number, because the mean of its divisors is an integer number (75711903).

Almost surely, 2^390513977 is an apocalyptic number.

It is an amenable number.

390513977 is a deficient number, since it is larger than the sum of its proper divisors (63757441).

390513977 is an equidigital number, since it uses as much as digits as its factorization.

390513977 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7969687 (or 7969680 counting only the distinct ones).

The product of its (nonzero) digits is 178605, while the sum is 44.

The square root of 390513977 is about 19761.4264920324. The cubic root of 390513977 is about 730.9351729038.

The spelling of 390513977 in words is "three hundred ninety million, five hundred thirteen thousand, nine hundred seventy-seven".