397984707 has 6 divisors (see below), whose sum is σ = 574866812. Its totient is φ = 265323132.

The previous prime is 397984703. The next prime is 397984729. The reversal of 397984707 is 707489793.

It is not a de Polignac number, because 397984707 - 2² = 397984703 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (397984703) 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, 22110253 + ... + 22110270.

Almost surely, 2^397984707 is an apocalyptic number.

397984707 is a deficient number, since it is larger than the sum of its proper divisors (176882105).

397984707 is a wasteful number, since it uses less digits than its factorization.

397984707 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44220529 (or 44220526 counting only the distinct ones).

The product of its (nonzero) digits is 2667168, while the sum is 54.

The square root of 397984707 is about 19949.5540551662. The cubic root of 397984707 is about 735.5668153062.

The spelling of 397984707 in words is "three hundred ninety-seven million, nine hundred eighty-four thousand, seven hundred seven".