89409869 has 2 divisors, whose sum is σ = 89409870. Its totient is φ = 89409868.

The previous prime is 89409833. The next prime is 89409907. The reversal of 89409869 is 96890498.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 50197225 + 39212644 = 7085^2 + 6262^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-89409869 is a prime.

It is a super-2 number, since 2×89409869² = 15988249349194322, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 89409869.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (89409769) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 44704934 + 44704935.

It is an arithmetic number, because the mean of its divisors is an integer number (44704935).

Almost surely, 2^89409869 is an apocalyptic number.

It is an amenable number.

89409869 is a deficient number, since it is larger than the sum of its proper divisors (1).

89409869 is an equidigital number, since it uses as much as digits as its factorization.

89409869 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1119744, while the sum is 53.

The square root of 89409869 is about 9455.6791929507. The cubic root of 89409869 is about 447.1588386291.

The spelling of 89409869 in words is "eighty-nine million, four hundred nine thousand, eight hundred sixty-nine".