63694399 has 2 divisors, whose sum is σ = 63694400. Its totient is φ = 63694398.

The previous prime is 63694357. The next prime is 63694409. The reversal of 63694399 is 99349636.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 63694399 - 2¹⁷ = 63563327 is a prime.

It is equal to p_3767989 and since 63694399 and 3767989 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (63692399) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 31847199 + 31847200.

It is an arithmetic number, because the mean of its divisors is an integer number (31847200).

Almost surely, 2^63694399 is an apocalyptic number.

63694399 is a deficient number, since it is larger than the sum of its proper divisors (1).

63694399 is an equidigital number, since it uses as much as digits as its factorization.

63694399 is an evil number, because the sum of its binary digits is even.

The product of its digits is 944784, while the sum is 49.

The square root of 63694399 is about 7980.8770821257. The cubic root of 63694399 is about 399.3623151854.

The spelling of 63694399 in words is "sixty-three million, six hundred ninety-four thousand, three hundred ninety-nine".