63672691 has 2 divisors, whose sum is σ = 63672692. Its totient is φ = 63672690.

The previous prime is 63672689. The next prime is 63672727. The reversal of 63672691 is 19627636.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 63672691 - 2¹ = 63672689 is a prime.

Together with 63672689, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (63672611) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 31836345 + 31836346.

It is an arithmetic number, because the mean of its divisors is an integer number (31836346).

Almost surely, 2^63672691 is an apocalyptic number.

63672691 is a deficient number, since it is larger than the sum of its proper divisors (1).

63672691 is an equidigital number, since it uses as much as digits as its factorization.

63672691 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 81648, while the sum is 40.

The square root of 63672691 is about 7979.5169653307. The cubic root of 63672691 is about 399.3169404882.

The spelling of 63672691 in words is "sixty-three million, six hundred seventy-two thousand, six hundred ninety-one".