89731489 has 2 divisors, whose sum is σ = 89731490. Its totient is φ = 89731488.

The previous prime is 89731459. The next prime is 89731501. The reversal of 89731489 is 98413798.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 88510464 + 1221025 = 9408^2 + 1105^2 .

It is a cyclic number.

It is not a de Polignac number, because 89731489 - 2⁷ = 89731361 is a prime.

It is not a weakly prime, because it can be changed into another prime (89731459) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 44865744 + 44865745.

It is an arithmetic number, because the mean of its divisors is an integer number (44865745).

Almost surely, 2^89731489 is an apocalyptic number.

It is an amenable number.

89731489 is a deficient number, since it is larger than the sum of its proper divisors (1).

89731489 is an equidigital number, since it uses as much as digits as its factorization.

89731489 is an evil number, because the sum of its binary digits is even.

The product of its digits is 435456, while the sum is 49.

The square root of 89731489 is about 9472.6706371540. The cubic root of 89731489 is about 447.6943616454.

The spelling of 89731489 in words is "eighty-nine million, seven hundred thirty-one thousand, four hundred eighty-nine".