89630991 has 6 divisors (see below), whose sum is σ = 129467000. Its totient is φ = 59753988.

The previous prime is 89630969. The next prime is 89631029. The reversal of 89630991 is 19903698.

89630991 is a `hidden beast` number, since 8 + 9 + 630 + 9 + 9 + 1 = 666.

It is not a de Polignac number, because 89630991 - 2¹⁴ = 89614607 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (89634991) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 4979491 + ... + 4979508.

Almost surely, 2^89630991 is an apocalyptic number.

89630991 is a deficient number, since it is larger than the sum of its proper divisors (39836009).

89630991 is a wasteful number, since it uses less digits than its factorization.

89630991 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9959005 (or 9959002 counting only the distinct ones).

The product of its (nonzero) digits is 104976, while the sum is 45.

The square root of 89630991 is about 9467.3645224001. The cubic root of 89630991 is about 447.5271620894.

The spelling of 89630991 in words is "eighty-nine million, six hundred thirty thousand, nine hundred ninety-one".