89724655 has 4 divisors (see below), whose sum is σ = 107669592. Its totient is φ = 71779720.

The previous prime is 89724647. The next prime is 89724673. The reversal of 89724655 is 55642798.

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

It is not a de Polignac number, because 89724655 - 2³ = 89724647 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8972461 + ... + 8972470.

It is an arithmetic number, because the mean of its divisors is an integer number (26917398).

Almost surely, 2^89724655 is an apocalyptic number.

89724655 is a deficient number, since it is larger than the sum of its proper divisors (17944937).

89724655 is a wasteful number, since it uses less digits than its factorization.

89724655 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17944936.

The product of its digits is 604800, while the sum is 46.

The square root of 89724655 is about 9472.3099083592. The cubic root of 89724655 is about 447.6829958065.

It can be divided in two parts, 897 and 24655, that added together give a palindrome (25552).

The spelling of 89724655 in words is "eighty-nine million, seven hundred twenty-four thousand, six hundred fifty-five".