397656101 has 4 divisors (see below), whose sum is σ = 398802432. Its totient is φ = 396509772.

The previous prime is 397656097. The next prime is 397656137. The reversal of 397656101 is 101656793.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 101656793 = 7 ⋅14522399.

It is a cyclic number.

It is not a de Polignac number, because 397656101 - 2² = 397656097 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 (397656151) 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, 572645 + ... + 573338.

It is an arithmetic number, because the mean of its divisors is an integer number (99700608).

Almost surely, 2^397656101 is an apocalyptic number.

It is an amenable number.

397656101 is a deficient number, since it is larger than the sum of its proper divisors (1146331).

397656101 is a wasteful number, since it uses less digits than its factorization.

397656101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1146330.

The product of its (nonzero) digits is 34020, while the sum is 38.

The square root of 397656101 is about 19941.3164309681. The cubic root of 397656101 is about 735.3643131997.

The spelling of 397656101 in words is "three hundred ninety-seven million, six hundred fifty-six thousand, one hundred one".