89671021 has 16 divisors (see below), whose sum is σ = 99426240. Its totient is φ = 80196480.

The previous prime is 89671009. The next prime is 89671033. The reversal of 89671021 is 12017698.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (89671009) and next prime (89671033).

It is a cyclic number.

It is not a de Polignac number, because 89671021 - 2⁵ = 89670989 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (89671061) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 236410 + ... + 236788.

It is an arithmetic number, because the mean of its divisors is an integer number (6214140).

Almost surely, 2^89671021 is an apocalyptic number.

It is an amenable number.

89671021 is a deficient number, since it is larger than the sum of its proper divisors (9755219).

89671021 is a wasteful number, since it uses less digits than its factorization.

89671021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 684.

The product of its (nonzero) digits is 6048, while the sum is 34.

The square root of 89671021 is about 9469.4783911259. The cubic root of 89671021 is about 447.5937753811.

It can be divided in two parts, 896 and 71021, that added together give a palindrome (71917).

The spelling of 89671021 in words is "eighty-nine million, six hundred seventy-one thousand, twenty-one".