68915969 has 2 divisors, whose sum is σ = 68915970. Its totient is φ = 68915968.

The previous prime is 68915933. The next prime is 68916019. The reversal of 68915969 is 96951986.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 58599025 + 10316944 = 7655^2 + 3212^2 .

It is a cyclic number.

It is not a de Polignac number, because 68915969 - 2¹² = 68911873 is a prime.

It is a super-2 number, since 2×68915969² = 9498821566417922, which contains 22 as substring.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 68915969.

It is not a weakly prime, because it can be changed into another prime (68915669) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34457984 + 34457985.

It is an arithmetic number, because the mean of its divisors is an integer number (34457985).

Almost surely, 2^68915969 is an apocalyptic number.

It is an amenable number.

68915969 is a deficient number, since it is larger than the sum of its proper divisors (1).

68915969 is an equidigital number, since it uses as much as digits as its factorization.

68915969 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1049760, while the sum is 53.

The square root of 68915969 is about 8301.5642501880. The cubic root of 68915969 is about 409.9900235526.

The spelling of 68915969 in words is "sixty-eight million, nine hundred fifteen thousand, nine hundred sixty-nine".