63641579 has 2 divisors, whose sum is σ = 63641580. Its totient is φ = 63641578.

The previous prime is 63641551. The next prime is 63641597. The reversal of 63641579 is 97514636.

Together with next prime (63641597) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 63641579 - 2¹⁶ = 63576043 is a prime.

It is a super-2 number, since 2×63641579² = 8100501155226482, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (63641509) by changing a digit.

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 as a sum of consecutive naturals, namely, 31820789 + 31820790.

It is an arithmetic number, because the mean of its divisors is an integer number (31820790).

Almost surely, 2^63641579 is an apocalyptic number.

63641579 is a deficient number, since it is larger than the sum of its proper divisors (1).

63641579 is an equidigital number, since it uses as much as digits as its factorization.

63641579 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 136080, while the sum is 41.

The square root of 63641579 is about 7977.5672356928. The cubic root of 63641579 is about 399.2518912890.

The spelling of 63641579 in words is "sixty-three million, six hundred forty-one thousand, five hundred seventy-nine".