89640169 has 2 divisors, whose sum is σ = 89640170. Its totient is φ = 89640168.

The previous prime is 89640151. The next prime is 89640181. The reversal of 89640169 is 96104698.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 89019225 + 620944 = 9435^2 + 788^2 .

It is a cyclic number.

It is not a de Polignac number, because 89640169 - 2⁵ = 89640137 is a prime.

It is a super-2 number, since 2×89640169² = 16070719796697122, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (89640149) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 44820084 + 44820085.

It is an arithmetic number, because the mean of its divisors is an integer number (44820085).

Almost surely, 2^89640169 is an apocalyptic number.

It is an amenable number.

89640169 is a deficient number, since it is larger than the sum of its proper divisors (1).

89640169 is an equidigital number, since it uses as much as digits as its factorization.

89640169 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 93312, while the sum is 43.

The square root of 89640169 is about 9467.8492277814. The cubic root of 89640169 is about 447.5424368066.

The spelling of 89640169 in words is "eighty-nine million, six hundred forty thousand, one hundred sixty-nine".