641538297 has 12 divisors (see below), whose sum is σ = 946383360. Its totient is φ = 418592088.

The previous prime is 641538283. The next prime is 641538323. The reversal of 641538297 is 792835146.

It is not a de Polignac number, because 641538297 - 2⁷ = 641538169 is a prime.

It is a hoax number, since the sum of its digits (45) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (641538217) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 757897 + ... + 758742.

It is an arithmetic number, because the mean of its divisors is an integer number (78865280).

Almost surely, 2^641538297 is an apocalyptic number.

It is an amenable number.

641538297 is a deficient number, since it is larger than the sum of its proper divisors (304845063).

641538297 is a wasteful number, since it uses less digits than its factorization.

641538297 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1516692 (or 1516689 counting only the distinct ones).

The product of its digits is 362880, while the sum is 45.

The square root of 641538297 is about 25328.6062980181. The cubic root of 641538297 is about 862.4637736517.

The spelling of 641538297 in words is "six hundred forty-one million, five hundred thirty-eight thousand, two hundred ninety-seven".