89957989 has 16 divisors (see below), whose sum is σ = 106102080. Its totient is φ = 75375360.

The previous prime is 89957969. The next prime is 89957993. The reversal of 89957989 is 98975998.

It is a cyclic number.

It is not a de Polignac number, because 89957989 - 2⁵ = 89957957 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 89957989.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (89957909) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1917 + ... + 13549.

It is an arithmetic number, because the mean of its divisors is an integer number (6631380).

Almost surely, 2^89957989 is an apocalyptic number.

It is an amenable number.

89957989 is a deficient number, since it is larger than the sum of its proper divisors (16144091).

89957989 is a wasteful number, since it uses less digits than its factorization.

89957989 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11700.

The product of its digits is 14696640, while the sum is 64.

The square root of 89957989 is about 9484.6185479438. The cubic root of 89957989 is about 448.0707348053.

Subtracting 89957989 from its reverse (98975998), we obtain a square (9018009 = 3003²).

The spelling of 89957989 in words is "eighty-nine million, nine hundred fifty-seven thousand, nine hundred eighty-nine".