89990869 has 2 divisors, whose sum is σ = 89990870. Its totient is φ = 89990868.

The previous prime is 89990851. The next prime is 89990893. The reversal of 89990869 is 96809998.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 69105969 + 20884900 = 8313^2 + 4570^2 .

It is a cyclic number.

It is not a de Polignac number, because 89990869 - 2²⁵ = 56436437 is a prime.

It is a super-2 number, since 2×89990869² = 16196713006750322, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (89990819) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 44995434 + 44995435.

It is an arithmetic number, because the mean of its divisors is an integer number (44995435).

Almost surely, 2^89990869 is an apocalyptic number.

It is an amenable number.

89990869 is a deficient number, since it is larger than the sum of its proper divisors (1).

89990869 is an equidigital number, since it uses as much as digits as its factorization.

89990869 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2519424, while the sum is 58.

The square root of 89990869 is about 9486.3517223430. The cubic root of 89990869 is about 448.1253186962.

The spelling of 89990869 in words is "eighty-nine million, nine hundred ninety thousand, eight hundred sixty-nine".