397417951 has 4 divisors (see below), whose sum is σ = 454191952. Its totient is φ = 340643952.

The previous prime is 397417921. The next prime is 397417963. The reversal of 397417951 is 159714793.

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

It is a cyclic number.

It is not a de Polignac number, because 397417951 - 2¹⁹ = 396893663 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (397417901) 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, 28386990 + ... + 28387003.

It is an arithmetic number, because the mean of its divisors is an integer number (113547988).

Almost surely, 2^397417951 is an apocalyptic number.

397417951 is a deficient number, since it is larger than the sum of its proper divisors (56774001).

397417951 is an equidigital number, since it uses as much as digits as its factorization.

397417951 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56774000.

The product of its digits is 238140, while the sum is 46.

The square root of 397417951 is about 19935.3442659012. The cubic root of 397417951 is about 735.2174845014.

The spelling of 397417951 in words is "three hundred ninety-seven million, four hundred seventeen thousand, nine hundred fifty-one".