397672791 has 8 divisors (see below), whose sum is σ = 530348784. Its totient is φ = 265056000.

The previous prime is 397672787. The next prime is 397672799. The reversal of 397672791 is 197276793.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 397672791 - 2² = 397672787 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (397672799) 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, 4455 + ... + 28551.

It is an arithmetic number, because the mean of its divisors is an integer number (66293598).

Almost surely, 2^397672791 is an apocalyptic number.

397672791 is a deficient number, since it is larger than the sum of its proper divisors (132675993).

397672791 is a wasteful number, since it uses less digits than its factorization.

397672791 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29601.

The product of its digits is 1000188, while the sum is 51.

The square root of 397672791 is about 19941.7349044661. The cubic root of 397672791 is about 735.3746010327.

It can be divided in two parts, 3976 and 72791, that added together give a palindrome (76767).

The spelling of 397672791 in words is "three hundred ninety-seven million, six hundred seventy-two thousand, seven hundred ninety-one".