90261189 has 16 divisors (see below), whose sum is σ = 133867200. Its totient is φ = 60108048.

The previous prime is 90261169. The next prime is 90261221. The reversal of 90261189 is 98116209.

It is not a de Polignac number, because 90261189 - 2¹⁵ = 90228421 is a prime.

It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (90261139) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 44062 + ... + 46064.

It is an arithmetic number, because the mean of its divisors is an integer number (8366700).

Almost surely, 2^90261189 is an apocalyptic number.

90261189 is the 6009-th heptagonal number.

It is an amenable number.

90261189 is a deficient number, since it is larger than the sum of its proper divisors (43606011).

90261189 is a wasteful number, since it uses less digits than its factorization.

90261189 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3681 (or 3675 counting only the distinct ones).

The product of its (nonzero) digits is 7776, while the sum is 36.

The square root of 90261189 is about 9500.5888764855. The cubic root of 90261189 is about 448.5735721186.

The spelling of 90261189 in words is "ninety million, two hundred sixty-one thousand, one hundred eighty-nine".