63672491 has 2 divisors, whose sum is σ = 63672492. Its totient is φ = 63672490.

The previous prime is 63672473. The next prime is 63672493. The reversal of 63672491 is 19427636.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 63672491 - 2¹⁴ = 63656107 is a prime.

It is a super-2 number, since 2×63672491² = 8108372220290162, which contains 22 as substring.

Together with 63672493, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (63672493) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 31836245 + 31836246.

It is an arithmetic number, because the mean of its divisors is an integer number (31836246).

Almost surely, 2^63672491 is an apocalyptic number.

63672491 is a deficient number, since it is larger than the sum of its proper divisors (1).

63672491 is an equidigital number, since it uses as much as digits as its factorization.

63672491 is an evil number, because the sum of its binary digits is even.

The product of its digits is 54432, while the sum is 38.

The square root of 63672491 is about 7979.5044332339. The cubic root of 63672491 is about 399.3165223944.

The spelling of 63672491 in words is "sixty-three million, six hundred seventy-two thousand, four hundred ninety-one".