68613851 has 2 divisors, whose sum is σ = 68613852. Its totient is φ = 68613850.

The previous prime is 68613827. The next prime is 68613863. The reversal of 68613851 is 15831686.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-68613851 is a prime.

It is not a weakly prime, because it can be changed into another prime (68613871) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34306925 + 34306926.

It is an arithmetic number, because the mean of its divisors is an integer number (34306926).

Almost surely, 2^68613851 is an apocalyptic number.

68613851 is a deficient number, since it is larger than the sum of its proper divisors (1).

68613851 is an equidigital number, since it uses as much as digits as its factorization.

68613851 is an evil number, because the sum of its binary digits is even.

The product of its digits is 34560, while the sum is 38.

The square root of 68613851 is about 8283.3478135353. The cubic root of 68613851 is about 409.3900329037.

The spelling of 68613851 in words is "sixty-eight million, six hundred thirteen thousand, eight hundred fifty-one".