397951001 has 8 divisors (see below), whose sum is σ = 464083200. Its totient is φ = 341100564.

The previous prime is 397950997. The next prime is 397951031. The reversal of 397951001 is 100159793.

It is not a de Polignac number, because 397951001 - 2² = 397950997 is a prime.

It is not an unprimeable number, because it can be changed into a prime (397951031) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 579761 + ... + 580446.

It is an arithmetic number, because the mean of its divisors is an integer number (58010400).

Almost surely, 2^397951001 is an apocalyptic number.

It is an amenable number.

397951001 is a deficient number, since it is larger than the sum of its proper divisors (66132199).

397951001 is an equidigital number, since it uses as much as digits as its factorization.

397951001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1160228 (or 1160214 counting only the distinct ones).

The product of its (nonzero) digits is 8505, while the sum is 35.

The square root of 397951001 is about 19948.7092564908. The cubic root of 397951001 is about 735.5460492528.

The spelling of 397951001 in words is "three hundred ninety-seven million, nine hundred fifty-one thousand, one".