68971379 has 2 divisors, whose sum is σ = 68971380. Its totient is φ = 68971378.

The previous prime is 68971333. The next prime is 68971381. The reversal of 68971379 is 97317986.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-68971379 is a prime.

It is a super-2 number, since 2×68971379² = 9514102242323282, which contains 22 as substring.

It is a Sophie Germain prime.

Together with 68971381, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (68971979) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34485689 + 34485690.

It is an arithmetic number, because the mean of its divisors is an integer number (34485690).

Almost surely, 2^68971379 is an apocalyptic number.

68971379 is a deficient number, since it is larger than the sum of its proper divisors (1).

68971379 is an equidigital number, since it uses as much as digits as its factorization.

68971379 is an evil number, because the sum of its binary digits is even.

The product of its digits is 571536, while the sum is 50.

The square root of 68971379 is about 8304.9009024792. The cubic root of 68971379 is about 410.0998745387.

The spelling of 68971379 in words is "sixty-eight million, nine hundred seventy-one thousand, three hundred seventy-nine".