641470023 has 20 divisors (see below), whose sum is σ = 999911088. Its totient is φ = 409052160.

The previous prime is 641470009. The next prime is 641470079. The reversal of 641470023 is 320074146.

It is not a de Polignac number, because 641470023 - 2⁸ = 641469767 is a prime.

It is a super-2 number, since 2×641470023² = 822967580815241058, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (641470003) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 170298 + ... + 174023.

Almost surely, 2^641470023 is an apocalyptic number.

641470023 is a deficient number, since it is larger than the sum of its proper divisors (358441065).

641470023 is a wasteful number, since it uses less digits than its factorization.

641470023 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 344356 (or 344347 counting only the distinct ones).

The product of its (nonzero) digits is 4032, while the sum is 27.

The square root of 641470023 is about 25327.2584975161. The cubic root of 641470023 is about 862.4331774317.

The spelling of 641470023 in words is "six hundred forty-one million, four hundred seventy thousand, twenty-three".