397760653 has 4 divisors (see below), whose sum is σ = 397839100. Its totient is φ = 397682208.

The previous prime is 397760633. The next prime is 397760663. The reversal of 397760653 is 356067793.

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 79602084 + 318158569 = 8922^2 + 17837^2 .

It is a cyclic number.

It is not a de Polignac number, because 397760653 - 2⁹ = 397760141 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 (397760633) 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, 31050 + ... + 41947.

It is an arithmetic number, because the mean of its divisors is an integer number (99459775).

Almost surely, 2^397760653 is an apocalyptic number.

It is an amenable number.

397760653 is a deficient number, since it is larger than the sum of its proper divisors (78447).

397760653 is an equidigital number, since it uses as much as digits as its factorization.

397760653 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 78446.

The product of its (nonzero) digits is 714420, while the sum is 46.

The square root of 397760653 is about 19943.9377506048. The cubic root of 397760653 is about 735.4287550398.

The spelling of 397760653 in words is "three hundred ninety-seven million, seven hundred sixty thousand, six hundred fifty-three".