68997529 has 2 divisors, whose sum is σ = 68997530. Its totient is φ = 68997528.

The previous prime is 68997521. The next prime is 68997541. The reversal of 68997529 is 92579986.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 45697600 + 23299929 = 6760^2 + 4827^2 .

It is a cyclic number.

It is not a de Polignac number, because 68997529 - 2³ = 68997521 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 68997529.

It is not a weakly prime, because it can be changed into another prime (68997521) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34498764 + 34498765.

It is an arithmetic number, because the mean of its divisors is an integer number (34498765).

Almost surely, 2^68997529 is an apocalyptic number.

It is an amenable number.

68997529 is a deficient number, since it is larger than the sum of its proper divisors (1).

68997529 is an equidigital number, since it uses as much as digits as its factorization.

68997529 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2449440, while the sum is 55.

The square root of 68997529 is about 8306.4751248649. The cubic root of 68997529 is about 410.1516967913.

The spelling of 68997529 in words is "sixty-eight million, nine hundred ninety-seven thousand, five hundred twenty-nine".