641297975 has 12 divisors (see below), whose sum is σ = 837063240. Its totient is φ = 486036000.

The previous prime is 641297957. The next prime is 641297981. The reversal of 641297975 is 579792146.

It is not a de Polignac number, because 641297975 - 2¹⁸ = 641035831 is a prime.

It is a super-2 number, since 2×641297975² = 822526185478201250, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 674576 + ... + 675525.

It is an arithmetic number, because the mean of its divisors is an integer number (69755270).

Almost surely, 2^641297975 is an apocalyptic number.

641297975 is a deficient number, since it is larger than the sum of its proper divisors (195765265).

641297975 is a wasteful number, since it uses less digits than its factorization.

641297975 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1350130 (or 1350125 counting only the distinct ones).

The product of its digits is 952560, while the sum is 50.

The square root of 641297975 is about 25323.8617710649. The cubic root of 641297975 is about 862.3560664390.

The spelling of 641297975 in words is "six hundred forty-one million, two hundred ninety-seven thousand, nine hundred seventy-five".