641131607 has 2 divisors, whose sum is σ = 641131608. Its totient is φ = 641131606.

The previous prime is 641131501. The next prime is 641131627. The reversal of 641131607 is 706131146.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-641131607 is a prime.

It is a super-2 number, since 2×641131607² = 822099474988804898, which contains 22 as substring.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 641131607.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (641131627) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 320565803 + 320565804.

It is an arithmetic number, because the mean of its divisors is an integer number (320565804).

Almost surely, 2^641131607 is an apocalyptic number.

641131607 is a deficient number, since it is larger than the sum of its proper divisors (1).

641131607 is an equidigital number, since it uses as much as digits as its factorization.

641131607 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3024, while the sum is 29.

The square root of 641131607 is about 25320.5767509352. The cubic root of 641131607 is about 862.2814880746.

The spelling of 641131607 in words is "six hundred forty-one million, one hundred thirty-one thousand, six hundred seven".