89638691 has 4 divisors (see below), whose sum is σ = 89748432. Its totient is φ = 89528952.

The previous prime is 89638687. The next prime is 89638699. The reversal of 89638691 is 19683698.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 89638691 - 2² = 89638687 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (89638699) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 53636 + ... + 55281.

It is an arithmetic number, because the mean of its divisors is an integer number (22437108).

Almost surely, 2^89638691 is an apocalyptic number.

89638691 is a deficient number, since it is larger than the sum of its proper divisors (109741).

89638691 is a wasteful number, since it uses less digits than its factorization.

89638691 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 109740.

The product of its digits is 559872, while the sum is 50.

The square root of 89638691 is about 9467.7711738297. The cubic root of 89638691 is about 447.5399770784.

The spelling of 89638691 in words is "eighty-nine million, six hundred thirty-eight thousand, six hundred ninety-one".