68920051 has 2 divisors, whose sum is σ = 68920052. Its totient is φ = 68920050.

The previous prime is 68920009. The next prime is 68920063. The reversal of 68920051 is 15002986.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 68920051 - 2¹⁵ = 68887283 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 68919995 and 68920022.

It is not a weakly prime, because it can be changed into another prime (68920451) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34460025 + 34460026.

It is an arithmetic number, because the mean of its divisors is an integer number (34460026).

Almost surely, 2^68920051 is an apocalyptic number.

68920051 is a deficient number, since it is larger than the sum of its proper divisors (1).

68920051 is an equidigital number, since it uses as much as digits as its factorization.

68920051 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4320, while the sum is 31.

The square root of 68920051 is about 8301.8101038268. The cubic root of 68920051 is about 409.9981181750.

The spelling of 68920051 in words is "sixty-eight million, nine hundred twenty thousand, fifty-one".