397422877 has 4 divisors (see below), whose sum is σ = 402867100. Its totient is φ = 391978656.

The previous prime is 397422863. The next prime is 397422887. The reversal of 397422877 is 778224793.

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

It can be written as a sum of positive squares in 2 ways, for example, as 155900196 + 241522681 = 12486^2 + 15541^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-397422877 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 397422877.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (397422847) 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, 2722002 + ... + 2722147.

It is an arithmetic number, because the mean of its divisors is an integer number (100716775).

Almost surely, 2^397422877 is an apocalyptic number.

It is an amenable number.

397422877 is a deficient number, since it is larger than the sum of its proper divisors (5444223).

397422877 is an equidigital number, since it uses as much as digits as its factorization.

397422877 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5444222.

The product of its digits is 1185408, while the sum is 49.

The square root of 397422877 is about 19935.4678149272. The cubic root of 397422877 is about 735.2205221652.

The spelling of 397422877 in words is "three hundred ninety-seven million, four hundred twenty-two thousand, eight hundred seventy-seven".