167664593 has 2 divisors, whose sum is σ = 167664594. Its totient is φ = 167664592.

The previous prime is 167664589. The next prime is 167664667. The reversal of 167664593 is 395466761.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 93566929 + 74097664 = 9673^2 + 8608^2 .

It is a cyclic number.

It is not a de Polignac number, because 167664593 - 2² = 167664589 is a prime.

It is a super-2 number, since 2×167664593² = 56222831491711298, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (167664793) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 83832296 + 83832297.

It is an arithmetic number, because the mean of its divisors is an integer number (83832297).

Almost surely, 2^167664593 is an apocalyptic number.

It is an amenable number.

167664593 is a deficient number, since it is larger than the sum of its proper divisors (1).

167664593 is an equidigital number, since it uses as much as digits as its factorization.

167664593 is an evil number, because the sum of its binary digits is even.

The product of its digits is 816480, while the sum is 47.

The square root of 167664593 is about 12948.5363265506. The cubic root of 167664593 is about 551.4173832982.

The spelling of 167664593 in words is "one hundred sixty-seven million, six hundred sixty-four thousand, five hundred ninety-three".