68513923 has 2 divisors, whose sum is σ = 68513924. Its totient is φ = 68513922.

The previous prime is 68513903. The next prime is 68513933. The reversal of 68513923 is 32931586.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 68513923 - 2¹⁷ = 68382851 is a prime.

It is not a weakly prime, because it can be changed into another prime (68513903) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34256961 + 34256962.

It is an arithmetic number, because the mean of its divisors is an integer number (34256962).

Almost surely, 2^68513923 is an apocalyptic number.

68513923 is a deficient number, since it is larger than the sum of its proper divisors (1).

68513923 is an equidigital number, since it uses as much as digits as its factorization.

68513923 is an evil number, because the sum of its binary digits is even.

The product of its digits is 38880, while the sum is 37.

The square root of 68513923 is about 8277.3137550778. The cubic root of 68513923 is about 409.1911935407.

The spelling of 68513923 in words is "sixty-eight million, five hundred thirteen thousand, nine hundred twenty-three".