90981121 has 8 divisors (see below), whose sum is σ = 113431104. Its totient is φ = 70894320.

The previous prime is 90981119. The next prime is 90981151. The reversal of 90981121 is 12118909.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 90981121 - 2¹ = 90981119 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (90981151) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 590710 + ... + 590863.

It is an arithmetic number, because the mean of its divisors is an integer number (14178888).

Almost surely, 2^90981121 is an apocalyptic number.

It is an amenable number.

90981121 is a deficient number, since it is larger than the sum of its proper divisors (22449983).

90981121 is a wasteful number, since it uses less digits than its factorization.

90981121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1181591.

The product of its (nonzero) digits is 1296, while the sum is 31.

The square root of 90981121 is about 9538.4024343702. The cubic root of 90981121 is about 449.7630373812.

The spelling of 90981121 in words is "ninety million, nine hundred eighty-one thousand, one hundred twenty-one".