396998739 has 20 divisors (see below), whose sum is σ = 627934824. Its totient is φ = 249096384.

The previous prime is 396998717. The next prime is 396998753. The reversal of 396998739 is 937899693.

It is not a de Polignac number, because 396998739 - 2⁷ = 396998611 is a prime.

It is not an unprimeable number, because it can be changed into a prime (396998759) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 142777 + ... + 145530.

Almost surely, 2^396998739 is an apocalyptic number.

396998739 is a deficient number, since it is larger than the sum of its proper divisors (230936085).

396998739 is a wasteful number, since it uses less digits than its factorization.

396998739 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 288336 (or 288327 counting only the distinct ones).

The product of its digits is 19840464, while the sum is 63.

The square root of 396998739 is about 19924.8272012582. The cubic root of 396998739 is about 734.9588814981.

The spelling of 396998739 in words is "three hundred ninety-six million, nine hundred ninety-eight thousand, seven hundred thirty-nine".