89909623 has 4 divisors (see below), whose sum is σ = 90596088. Its totient is φ = 89223160.

The previous prime is 89909609. The next prime is 89909681. The reversal of 89909623 is 32690998.

It is a happy number.

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 89909623 - 2⁹ = 89909111 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 (89909683) 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, 343036 + ... + 343297.

It is an arithmetic number, because the mean of its divisors is an integer number (22649022).

Almost surely, 2^89909623 is an apocalyptic number.

89909623 is a deficient number, since it is larger than the sum of its proper divisors (686465).

89909623 is a wasteful number, since it uses less digits than its factorization.

89909623 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 686464.

The product of its (nonzero) digits is 209952, while the sum is 46.

The square root of 89909623 is about 9482.0684979597. The cubic root of 89909623 is about 447.9904185212.

The spelling of 89909623 in words is "eighty-nine million, nine hundred nine thousand, six hundred twenty-three".