63934691 has 2 divisors, whose sum is σ = 63934692. Its totient is φ = 63934690.

The previous prime is 63934667. The next prime is 63934693. The reversal of 63934691 is 19643936.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 63934691 - 2¹⁴ = 63918307 is a prime.

It is a Sophie Germain prime.

Together with 63934693, 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 (63934693) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 31967345 + 31967346.

It is an arithmetic number, because the mean of its divisors is an integer number (31967346).

Almost surely, 2^63934691 is an apocalyptic number.

63934691 is a deficient number, since it is larger than the sum of its proper divisors (1).

63934691 is an equidigital number, since it uses as much as digits as its factorization.

63934691 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 104976, while the sum is 41.

The square root of 63934691 is about 7995.9171456438. The cubic root of 63934691 is about 399.8638932760.

The spelling of 63934691 in words is "sixty-three million, nine hundred thirty-four thousand, six hundred ninety-one".