89491212 has 18 divisors (see below), whose sum is σ = 226213988. Its totient is φ = 29830392.

The previous prime is 89491201. The next prime is 89491217. The reversal of 89491212 is 21219498.

It is a tau number, because it is divible by the number of its divisors (18).

It is a Harshad number since it is a multiple of its sum of digits (36), and also a Moran number because the ratio is a prime number: 2485867 = 89491212 / (8 + 9 + 4 + 9 + 1 + 2 + 1 + 2).

It is not an unprimeable number, because it can be changed into a prime (89491217) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1242898 + ... + 1242969.

Almost surely, 2^89491212 is an apocalyptic number.

It is an amenable number.

89491212 is an abundant number, since it is smaller than the sum of its proper divisors (136722776).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

89491212 is a wasteful number, since it uses less digits than its factorization.

89491212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2485877 (or 2485872 counting only the distinct ones).

The product of its digits is 10368, while the sum is 36.

The square root of 89491212 is about 9459.9794925782. The cubic root of 89491212 is about 447.2944023981.

The spelling of 89491212 in words is "eighty-nine million, four hundred ninety-one thousand, two hundred twelve".