641703897 has 8 divisors (see below), whose sum is σ = 950672480. Its totient is φ = 427802580.

The previous prime is 641703889. The next prime is 641703901. The reversal of 641703897 is 798307146.

It is not a de Polignac number, because 641703897 - 2³ = 641703889 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (641703817) 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, 11883379 + ... + 11883432.

It is an arithmetic number, because the mean of its divisors is an integer number (118834060).

Almost surely, 2^641703897 is an apocalyptic number.

It is an amenable number.

641703897 is a deficient number, since it is larger than the sum of its proper divisors (308968583).

641703897 is a wasteful number, since it uses less digits than its factorization.

641703897 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23766820 (or 23766814 counting only the distinct ones).

The product of its (nonzero) digits is 254016, while the sum is 45.

The square root of 641703897 is about 25331.8751181195. The cubic root of 641703897 is about 862.5379763997.

The spelling of 641703897 in words is "six hundred forty-one million, seven hundred three thousand, eight hundred ninety-seven".