63904007 has 2 divisors, whose sum is σ = 63904008. Its totient is φ = 63904006.

The previous prime is 63903979. The next prime is 63904019. The reversal of 63904007 is 70040936.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-63904007 is a prime.

It is a super-2 number, since 2×63904007² = 8167444221312098, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (63904307) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 31952003 + 31952004.

It is an arithmetic number, because the mean of its divisors is an integer number (31952004).

Almost surely, 2^63904007 is an apocalyptic number.

63904007 is a deficient number, since it is larger than the sum of its proper divisors (1).

63904007 is an equidigital number, since it uses as much as digits as its factorization.

63904007 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4536, while the sum is 29.

The square root of 63904007 is about 7993.9981861394. The cubic root of 63904007 is about 399.7999145145.

Adding to 63904007 its sum of digits (29), we get a square (63904036 = 7994²).

The spelling of 63904007 in words is "sixty-three million, nine hundred four thousand, seven".