397461971 has 4 divisors (see below), whose sum is σ = 399900552. Its totient is φ = 395023392.

The previous prime is 397461949. The next prime is 397461979. The reversal of 397461971 is 179164793.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-397461971 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (397461979) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1219046 + ... + 1219371.

It is an arithmetic number, because the mean of its divisors is an integer number (99975138).

Almost surely, 2^397461971 is an apocalyptic number.

397461971 is a deficient number, since it is larger than the sum of its proper divisors (2438581).

397461971 is a wasteful number, since it uses less digits than its factorization.

397461971 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2438580.

The product of its digits is 285768, while the sum is 47.

The square root of 397461971 is about 19936.4483045501. The cubic root of 397461971 is about 735.2446289545.

The spelling of 397461971 in words is "three hundred ninety-seven million, four hundred sixty-one thousand, nine hundred seventy-one".