89121556 has 12 divisors (see below), whose sum is σ = 156079840. Its totient is φ = 44527320.

The previous prime is 89121551. The next prime is 89121569. The reversal of 89121556 is 65512198.

It is a super-2 number, since 2×89121556² = 15885303487722272, which contains 22 as substring.

It is a hoax number, since the sum of its digits (37) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (89121551) 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, 1800 + ... + 13471.

Almost surely, 2^89121556 is an apocalyptic number.

It is an amenable number.

89121556 is a deficient number, since it is larger than the sum of its proper divisors (66958284).

89121556 is a wasteful number, since it uses less digits than its factorization.

89121556 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16734 (or 16732 counting only the distinct ones).

The product of its digits is 21600, while the sum is 37.

The square root of 89121556 is about 9440.4213889000. The cubic root of 89121556 is about 446.6776817164.

The spelling of 89121556 in words is "eighty-nine million, one hundred twenty-one thousand, five hundred fifty-six".