89451621 has 40 divisors (see below), whose sum is σ = 154725120. Its totient is φ = 50442912.

The previous prime is 89451619. The next prime is 89451667. The reversal of 89451621 is 12615498.

It is not a de Polignac number, because 89451621 - 2¹ = 89451619 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (89451421) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 43795 + ... + 45791.

It is an arithmetic number, because the mean of its divisors is an integer number (3868128).

Almost surely, 2^89451621 is an apocalyptic number.

89451621 is a gapful number since it is divisible by the number (81) formed by its first and last digit.

It is an amenable number.

89451621 is a deficient number, since it is larger than the sum of its proper divisors (65273499).

89451621 is a wasteful number, since it uses less digits than its factorization.

89451621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2095 (or 2086 counting only the distinct ones).

The product of its digits is 17280, while the sum is 36.

The square root of 89451621 is about 9457.8867089853. The cubic root of 89451621 is about 447.2284315078.

The spelling of 89451621 in words is "eighty-nine million, four hundred fifty-one thousand, six hundred twenty-one".