641588971 has 2 divisors, whose sum is σ = 641588972. Its totient is φ = 641588970.

The previous prime is 641588929. The next prime is 641588999. The reversal of 641588971 is 179885146.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 641588971 - 2¹⁷ = 641457899 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (641588071) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 320794485 + 320794486.

It is an arithmetic number, because the mean of its divisors is an integer number (320794486).

Almost surely, 2^641588971 is an apocalyptic number.

641588971 is a deficient number, since it is larger than the sum of its proper divisors (1).

641588971 is an equidigital number, since it uses as much as digits as its factorization.

641588971 is an evil number, because the sum of its binary digits is even.

The product of its digits is 483840, while the sum is 49.

The square root of 641588971 is about 25329.6066096574. The cubic root of 641588971 is about 862.4864812276.

The spelling of 641588971 in words is "six hundred forty-one million, five hundred eighty-eight thousand, nine hundred seventy-one".