68531873 has 2 divisors, whose sum is σ = 68531874. Its totient is φ = 68531872.

The previous prime is 68531857. The next prime is 68531891. The reversal of 68531873 is 37813586.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 62853184 + 5678689 = 7928^2 + 2383^2 .

It is a cyclic number.

It is not a de Polignac number, because 68531873 - 2⁴ = 68531857 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 68531873.

It is not a weakly prime, because it can be changed into another prime (68531893) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34265936 + 34265937.

It is an arithmetic number, because the mean of its divisors is an integer number (34265937).

Almost surely, 2^68531873 is an apocalyptic number.

It is an amenable number.

68531873 is a deficient number, since it is larger than the sum of its proper divisors (1).

68531873 is an equidigital number, since it uses as much as digits as its factorization.

68531873 is an evil number, because the sum of its binary digits is even.

The product of its digits is 120960, while the sum is 41.

The square root of 68531873 is about 8278.3979730380. The cubic root of 68531873 is about 409.2269251617.

The spelling of 68531873 in words is "sixty-eight million, five hundred thirty-one thousand, eight hundred seventy-three".