167564993 has 2 divisors, whose sum is σ = 167564994. Its totient is φ = 167564992.

The previous prime is 167564981. The next prime is 167565007. The reversal of 167564993 is 399465761.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 122500624 + 45064369 = 11068^2 + 6713^2 .

It is an emirp because it is prime and its reverse (399465761) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 167564993 - 2⁴ = 167564977 is a prime.

It is not a weakly prime, because it can be changed into another prime (167564963) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 83782496 + 83782497.

It is an arithmetic number, because the mean of its divisors is an integer number (83782497).

Almost surely, 2^167564993 is an apocalyptic number.

It is an amenable number.

167564993 is a deficient number, since it is larger than the sum of its proper divisors (1).

167564993 is an equidigital number, since it uses as much as digits as its factorization.

167564993 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1224720, while the sum is 50.

The square root of 167564993 is about 12944.6897606702. The cubic root of 167564993 is about 551.3081731003.

The spelling of 167564993 in words is "one hundred sixty-seven million, five hundred sixty-four thousand, nine hundred ninety-three".