90472181 has 8 divisors (see below), whose sum is σ = 96485760. Its totient is φ = 84535488.

The previous prime is 90472169. The next prime is 90472183. The reversal of 90472181 is 18127409.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-90472181 is a prime.

It is a super-2 number, since 2×90472181² = 16370431069793522, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (90472183) 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 7 ways as a sum of consecutive naturals, for example, 16781 + ... + 21506.

It is an arithmetic number, because the mean of its divisors is an integer number (12060720).

Almost surely, 2^90472181 is an apocalyptic number.

It is an amenable number.

90472181 is a deficient number, since it is larger than the sum of its proper divisors (6013579).

90472181 is a wasteful number, since it uses less digits than its factorization.

90472181 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38443.

The product of its (nonzero) digits is 4032, while the sum is 32.

The square root of 90472181 is about 9511.6865486621. The cubic root of 90472181 is about 448.9228244199.

The spelling of 90472181 in words is "ninety million, four hundred seventy-two thousand, one hundred eighty-one".