397276561 has 8 divisors (see below), whose sum is σ = 433540800. Its totient is φ = 361037040.

The previous prime is 397276541. The next prime is 397276577. The reversal of 397276561 is 165672793.

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

It is a cyclic number.

It is not a de Polignac number, because 397276561 - 2⁹ = 397276049 is a prime.

It is not an unprimeable number, because it can be changed into a prime (397276541) 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, 48555 + ... + 56143.

It is an arithmetic number, because the mean of its divisors is an integer number (54192600).

Almost surely, 2^397276561 is an apocalyptic number.

It is an amenable number.

397276561 is a deficient number, since it is larger than the sum of its proper divisors (36264239).

397276561 is a wasteful number, since it uses less digits than its factorization.

397276561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12359.

The product of its digits is 476280, while the sum is 46.

The square root of 397276561 is about 19931.7977362806. The cubic root of 397276561 is about 735.1302843384.

The spelling of 397276561 in words is "three hundred ninety-seven million, two hundred seventy-six thousand, five hundred sixty-one".