68631259 has 2 divisors, whose sum is σ = 68631260. Its totient is φ = 68631258.

The previous prime is 68631247. The next prime is 68631307. The reversal of 68631259 is 95213686.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-68631259 is a prime.

It is not a weakly prime, because it can be changed into another prime (68631209) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34315629 + 34315630.

It is an arithmetic number, because the mean of its divisors is an integer number (34315630).

Almost surely, 2^68631259 is an apocalyptic number.

68631259 is a deficient number, since it is larger than the sum of its proper divisors (1).

68631259 is an equidigital number, since it uses as much as digits as its factorization.

68631259 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 77760, while the sum is 40.

The square root of 68631259 is about 8284.3985297667. The cubic root of 68631259 is about 409.4246520511.

The spelling of 68631259 in words is "sixty-eight million, six hundred thirty-one thousand, two hundred fifty-nine".