168964509 has 32 divisors (see below), whose sum is σ = 269697024. Its totient is φ = 91998720.

The previous prime is 168964507. The next prime is 168964517. The reversal of 168964509 is 905469861.

It is not a de Polignac number, because 168964509 - 2¹ = 168964507 is a prime.

It is a super-2 number, since 2×168964509² = 57098010603222162, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (168964507) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 170004 + ... + 170994.

It is an arithmetic number, because the mean of its divisors is an integer number (8428032).

Almost surely, 2^168964509 is an apocalyptic number.

It is an amenable number.

168964509 is a deficient number, since it is larger than the sum of its proper divisors (100732515).

168964509 is a wasteful number, since it uses less digits than its factorization.

168964509 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1377.

The product of its (nonzero) digits is 466560, while the sum is 48.

The square root of 168964509 is about 12998.6348898644. The cubic root of 168964509 is about 552.8387761441.

The spelling of 168964509 in words is "one hundred sixty-eight million, nine hundred sixty-four thousand, five hundred nine".