641293131 has 4 divisors (see below), whose sum is σ = 855057512. Its totient is φ = 427528752.

The previous prime is 641293067. The next prime is 641293189. The reversal of 641293131 is 131392146.

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

It is not a de Polignac number, because 641293131 - 2⁶ = 641293067 is a prime.

It is a super-2 number, since 2×641293131² = 822513759735566322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (641293031) 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, 106882186 + ... + 106882191.

It is an arithmetic number, because the mean of its divisors is an integer number (213764378).

Almost surely, 2^641293131 is an apocalyptic number.

641293131 is a deficient number, since it is larger than the sum of its proper divisors (213764381).

641293131 is a wasteful number, since it uses less digits than its factorization.

641293131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 213764380.

The product of its digits is 3888, while the sum is 30.

The square root of 641293131 is about 25323.7661298631. The cubic root of 641293131 is about 862.3538951845.

The spelling of 641293131 in words is "six hundred forty-one million, two hundred ninety-three thousand, one hundred thirty-one".