90113881 has 8 divisors (see below), whose sum is σ = 105868224. Its totient is φ = 75619920.

The previous prime is 90113867. The next prime is 90113887. The reversal of 90113881 is 18831109.

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

It is a cyclic number.

It is not a de Polignac number, because 90113881 - 2¹³ = 90105689 is a prime.

It is a super-2 number, since 2×90113881² = 16241023097764322, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (90113887) 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, 314941 + ... + 315226.

It is an arithmetic number, because the mean of its divisors is an integer number (13233528).

Almost surely, 2^90113881 is an apocalyptic number.

It is an amenable number.

90113881 is a deficient number, since it is larger than the sum of its proper divisors (15754343).

90113881 is a wasteful number, since it uses less digits than its factorization.

90113881 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 630191.

The product of its (nonzero) digits is 1728, while the sum is 31.

The square root of 90113881 is about 9492.8331387421. The cubic root of 90113881 is about 448.3294123410.

The spelling of 90113881 in words is "ninety million, one hundred thirteen thousand, eight hundred eighty-one".