68907331 has 2 divisors, whose sum is σ = 68907332. Its totient is φ = 68907330.

The previous prime is 68907329. The next prime is 68907353. The reversal of 68907331 is 13370986.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 68907331 - 2¹ = 68907329 is a prime.

It is a super-2 number, since 2×68907331² = 9496440531087122, which contains 22 as substring.

Together with 68907329, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (68907361) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34453665 + 34453666.

It is an arithmetic number, because the mean of its divisors is an integer number (34453666).

Almost surely, 2^68907331 is an apocalyptic number.

68907331 is a deficient number, since it is larger than the sum of its proper divisors (1).

68907331 is an equidigital number, since it uses as much as digits as its factorization.

68907331 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 27216, while the sum is 37.

The square root of 68907331 is about 8301.0439704895. The cubic root of 68907331 is about 409.9728933100.

The spelling of 68907331 in words is "sixty-eight million, nine hundred seven thousand, three hundred thirty-one".