90396181 has 4 divisors (see below), whose sum is σ = 92319552. Its totient is φ = 88472812.

The previous prime is 90396179. The next prime is 90396211. The reversal of 90396181 is 18169309.

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 90396181 - 2¹ = 90396179 is a prime.

It is a super-2 number, since 2×90396181² = 16342939078769522, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 90396181.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (90396121) 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 3 ways as a sum of consecutive naturals, for example, 961615 + ... + 961708.

It is an arithmetic number, because the mean of its divisors is an integer number (23079888).

Almost surely, 2^90396181 is an apocalyptic number.

It is an amenable number.

90396181 is a deficient number, since it is larger than the sum of its proper divisors (1923371).

90396181 is a wasteful number, since it uses less digits than its factorization.

90396181 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1923370.

The product of its (nonzero) digits is 11664, while the sum is 37.

The square root of 90396181 is about 9507.6906239107. The cubic root of 90396181 is about 448.7970852434.

The spelling of 90396181 in words is "ninety million, three hundred ninety-six thousand, one hundred eighty-one".