396999507 has 4 divisors (see below), whose sum is σ = 529332680. Its totient is φ = 264666336.

The previous prime is 396999479. The next prime is 396999557. The reversal of 396999507 is 705999693.

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

It is not a de Polignac number, because 396999507 - 2⁶ = 396999443 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (396999557) 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, 66166582 + ... + 66166587.

It is an arithmetic number, because the mean of its divisors is an integer number (132333170).

Almost surely, 2^396999507 is an apocalyptic number.

396999507 is a deficient number, since it is larger than the sum of its proper divisors (132333173).

396999507 is a wasteful number, since it uses less digits than its factorization.

396999507 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 132333172.

The product of its (nonzero) digits is 4133430, while the sum is 57.

The square root of 396999507 is about 19924.8464736871. The cubic root of 396999507 is about 734.9593554275.

The spelling of 396999507 in words is "three hundred ninety-six million, nine hundred ninety-nine thousand, five hundred seven".