68647331 has 2 divisors, whose sum is σ = 68647332. Its totient is φ = 68647330.

The previous prime is 68647291. The next prime is 68647339. The reversal of 68647331 is 13374686.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-68647331 is a prime.

It is a super-2 number, since 2×68647331² = 9424912106847122, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (68647339) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34323665 + 34323666.

It is an arithmetic number, because the mean of its divisors is an integer number (34323666).

Almost surely, 2^68647331 is an apocalyptic number.

68647331 is a deficient number, since it is larger than the sum of its proper divisors (1).

68647331 is an equidigital number, since it uses as much as digits as its factorization.

68647331 is an evil number, because the sum of its binary digits is even.

The product of its digits is 72576, while the sum is 38.

The square root of 68647331 is about 8285.3684890897. The cubic root of 68647331 is about 409.4566091094.

The spelling of 68647331 in words is "sixty-eight million, six hundred forty-seven thousand, three hundred thirty-one".