68638007 has 2 divisors, whose sum is σ = 68638008. Its totient is φ = 68638006.

The previous prime is 68637979. The next prime is 68638057. The reversal of 68638007 is 70083686.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 68638007 - 2²² = 64443703 is a prime.

It is a super-2 number, since 2×68638007² = 9422352009864098, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (68638057) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34319003 + 34319004.

It is an arithmetic number, because the mean of its divisors is an integer number (34319004).

Almost surely, 2^68638007 is an apocalyptic number.

68638007 is a deficient number, since it is larger than the sum of its proper divisors (1).

68638007 is an equidigital number, since it uses as much as digits as its factorization.

68638007 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 48384, while the sum is 38.

The square root of 68638007 is about 8284.8057913267. The cubic root of 68638007 is about 409.4380701692.

The spelling of 68638007 in words is "sixty-eight million, six hundred thirty-eight thousand, seven".