68184731 has 2 divisors, whose sum is σ = 68184732. Its totient is φ = 68184730.

The previous prime is 68184709. The next prime is 68184757. The reversal of 68184731 is 13748186.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-68184731 is a prime.

It is a super-2 number, since 2×68184731² = 9298315083084722, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (68184131) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34092365 + 34092366.

It is an arithmetic number, because the mean of its divisors is an integer number (34092366).

Almost surely, 2^68184731 is an apocalyptic number.

68184731 is a deficient number, since it is larger than the sum of its proper divisors (1).

68184731 is an equidigital number, since it uses as much as digits as its factorization.

68184731 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 32256, while the sum is 38.

The square root of 68184731 is about 8257.4046164639. The cubic root of 68184731 is about 408.5347878729.

The spelling of 68184731 in words is "sixty-eight million, one hundred eighty-four thousand, seven hundred thirty-one".