641329411 has 2 divisors, whose sum is σ = 641329412. Its totient is φ = 641329410.

The previous prime is 641329373. The next prime is 641329501. The reversal of 641329411 is 114923146.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-641329411 is a prime.

It is a super-2 number, since 2×641329411² = 822606826827213842, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (641929411) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 320664705 + 320664706.

It is an arithmetic number, because the mean of its divisors is an integer number (320664706).

Almost surely, 2^641329411 is an apocalyptic number.

641329411 is a deficient number, since it is larger than the sum of its proper divisors (1).

641329411 is an equidigital number, since it uses as much as digits as its factorization.

641329411 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5184, while the sum is 31.

The square root of 641329411 is about 25324.4824428852. The cubic root of 641329411 is about 862.3701569156.

The spelling of 641329411 in words is "six hundred forty-one million, three hundred twenty-nine thousand, four hundred eleven".