641199023 has 4 divisors (see below), whose sum is σ = 674946360. Its totient is φ = 607451688.

The previous prime is 641198989. The next prime is 641199029. The reversal of 641199023 is 320991146.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 641199023 - 2¹² = 641194927 is a prime.

It is a super-2 number, since 2×641199023² = 822272374192309058, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (641199029) 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, 16873640 + ... + 16873677.

It is an arithmetic number, because the mean of its divisors is an integer number (168736590).

Almost surely, 2^641199023 is an apocalyptic number.

641199023 is a deficient number, since it is larger than the sum of its proper divisors (33747337).

641199023 is a wasteful number, since it uses less digits than its factorization.

641199023 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33747336.

The product of its (nonzero) digits is 11664, while the sum is 35.

The square root of 641199023 is about 25321.9079652383. The cubic root of 641199023 is about 862.3117104349.

The spelling of 641199023 in words is "six hundred forty-one million, one hundred ninety-nine thousand, twenty-three".