167641609 has 2 divisors, whose sum is σ = 167641610. Its totient is φ = 167641608.

The previous prime is 167641601. The next prime is 167641613. The reversal of 167641609 is 906146761.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 97081609 + 70560000 = 9853^2 + 8400^2 .

It is a cyclic number.

It is not a de Polignac number, because 167641609 - 2³ = 167641601 is a prime.

It is not a weakly prime, because it can be changed into another prime (167641601) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 83820804 + 83820805.

It is an arithmetic number, because the mean of its divisors is an integer number (83820805).

Almost surely, 2^167641609 is an apocalyptic number.

It is an amenable number.

167641609 is a deficient number, since it is larger than the sum of its proper divisors (1).

167641609 is an equidigital number, since it uses as much as digits as its factorization.

167641609 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 54432, while the sum is 40.

The square root of 167641609 is about 12947.6487826941. The cubic root of 167641609 is about 551.3921854591.

The spelling of 167641609 in words is "one hundred sixty-seven million, six hundred forty-one thousand, six hundred nine".