397947963 has 12 divisors (see below), whose sum is σ = 617225640. Its totient is φ = 227398752.

The previous prime is 397947941. The next prime is 397947973. The reversal of 397947963 is 369749793.

It is a de Polignac number, because none of the positive numbers 2^k-397947963 is a prime.

It is not an unprimeable number, because it can be changed into a prime (397947973) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1353418 + ... + 1353711.

It is an arithmetic number, because the mean of its divisors is an integer number (51435470).

Almost surely, 2^397947963 is an apocalyptic number.

397947963 is a deficient number, since it is larger than the sum of its proper divisors (219277677).

397947963 is a wasteful number, since it uses less digits than its factorization.

397947963 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2707146 (or 2707139 counting only the distinct ones).

The product of its digits is 7715736, while the sum is 57.

The square root of 397947963 is about 19948.6331110680. The cubic root of 397947963 is about 735.5441775026.

The spelling of 397947963 in words is "three hundred ninety-seven million, nine hundred forty-seven thousand, nine hundred sixty-three".