168964531 has 2 divisors, whose sum is σ = 168964532. Its totient is φ = 168964530.

The previous prime is 168964529. The next prime is 168964541. The reversal of 168964531 is 135469861.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 168964531 - 2¹ = 168964529 is a prime.

It is a super-2 number, since 2×168964531² = 57098025472099922, which contains 22 as substring.

Together with 168964529, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (168964541) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 84482265 + 84482266.

It is an arithmetic number, because the mean of its divisors is an integer number (84482266).

Almost surely, 2^168964531 is an apocalyptic number.

168964531 is a deficient number, since it is larger than the sum of its proper divisors (1).

168964531 is an equidigital number, since it uses as much as digits as its factorization.

168964531 is an evil number, because the sum of its binary digits is even.

The product of its digits is 155520, while the sum is 43.

The square root of 168964531 is about 12998.6357361071. The cubic root of 168964531 is about 552.8388001382.

The spelling of 168964531 in words is "one hundred sixty-eight million, nine hundred sixty-four thousand, five hundred thirty-one".