68323531 has 2 divisors, whose sum is σ = 68323532. Its totient is φ = 68323530.

The previous prime is 68323523. The next prime is 68323543. The reversal of 68323531 is 13532386.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 68323531 - 2³ = 68323523 is a prime.

It is a super-2 number, since 2×68323531² = 9336209776615922, which contains 22 as substring.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 68323493 and 68323502.

It is not a weakly prime, because it can be changed into another prime (68323231) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34161765 + 34161766.

It is an arithmetic number, because the mean of its divisors is an integer number (34161766).

Almost surely, 2^68323531 is an apocalyptic number.

68323531 is a deficient number, since it is larger than the sum of its proper divisors (1).

68323531 is an equidigital number, since it uses as much as digits as its factorization.

68323531 is an evil number, because the sum of its binary digits is even.

The product of its digits is 12960, while the sum is 31.

The square root of 68323531 is about 8265.8049214822. The cubic root of 68323531 is about 408.8118107700.

The spelling of 68323531 in words is "sixty-eight million, three hundred twenty-three thousand, five hundred thirty-one".