397406961 has 12 divisors (see below), whose sum is σ = 656036992. Its totient is φ = 227089656.

The previous prime is 397406959. The next prime is 397406969. The reversal of 397406961 is 169604793.

It is not a de Polignac number, because 397406961 - 2¹ = 397406959 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (397406969) 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, 3153961 + ... + 3154086.

Almost surely, 2^397406961 is an apocalyptic number.

It is an amenable number.

397406961 is a deficient number, since it is larger than the sum of its proper divisors (258630031).

397406961 is a wasteful number, since it uses less digits than its factorization.

397406961 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6308060 (or 6308057 counting only the distinct ones).

The product of its (nonzero) digits is 244944, while the sum is 45.

The square root of 397406961 is about 19935.0686229067. The cubic root of 397406961 is about 735.2107073250.

The spelling of 397406961 in words is "three hundred ninety-seven million, four hundred six thousand, nine hundred sixty-one".