68723947 has 2 divisors, whose sum is σ = 68723948. Its totient is φ = 68723946.

The previous prime is 68723929. The next prime is 68723957. The reversal of 68723947 is 74932786.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 68723947 - 2⁷ = 68723819 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 68723897 and 68723906.

It is not a weakly prime, because it can be changed into another prime (68723927) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34361973 + 34361974.

It is an arithmetic number, because the mean of its divisors is an integer number (34361974).

Almost surely, 2^68723947 is an apocalyptic number.

68723947 is a deficient number, since it is larger than the sum of its proper divisors (1).

68723947 is an equidigital number, since it uses as much as digits as its factorization.

68723947 is an evil number, because the sum of its binary digits is even.

The product of its digits is 508032, while the sum is 46.

The square root of 68723947 is about 8289.9907720093. The cubic root of 68723947 is about 409.6088814240.

The spelling of 68723947 in words is "sixty-eight million, seven hundred twenty-three thousand, nine hundred forty-seven".