90412989 has 4 divisors (see below), whose sum is σ = 120550656. Its totient is φ = 60275324.

The previous prime is 90412969. The next prime is 90412991. The reversal of 90412989 is 98921409.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 90412989 - 2¹¹ = 90410941 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 90412989.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (90412969) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15068829 + ... + 15068834.

It is an arithmetic number, because the mean of its divisors is an integer number (30137664).

Almost surely, 2^90412989 is an apocalyptic number.

It is an amenable number.

90412989 is a deficient number, since it is larger than the sum of its proper divisors (30137667).

90412989 is a wasteful number, since it uses less digits than its factorization.

90412989 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30137666.

The product of its (nonzero) digits is 46656, while the sum is 42.

The square root of 90412989 is about 9508.5744988405. The cubic root of 90412989 is about 448.8248995228.

The spelling of 90412989 in words is "ninety million, four hundred twelve thousand, nine hundred eighty-nine".