89556869 has 2 divisors, whose sum is σ = 89556870. Its totient is φ = 89556868.

The previous prime is 89556839. The next prime is 89556877. The reversal of 89556869 is 96865598.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 59985025 + 29571844 = 7745^2 + 5438^2 .

It is a cyclic number.

It is not a de Polignac number, because 89556869 - 2²⁰ = 88508293 is a prime.

It is a super-2 number, since 2×89556869² = 16040865570166322, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (89556839) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 44778434 + 44778435.

It is an arithmetic number, because the mean of its divisors is an integer number (44778435).

Almost surely, 2^89556869 is an apocalyptic number.

It is an amenable number.

89556869 is a deficient number, since it is larger than the sum of its proper divisors (1).

89556869 is an equidigital number, since it uses as much as digits as its factorization.

89556869 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4665600, while the sum is 56.

The square root of 89556869 is about 9463.4491069588. The cubic root of 89556869 is about 447.4037644562.

The spelling of 89556869 in words is "eighty-nine million, five hundred fifty-six thousand, eight hundred sixty-nine".