90947138 has 8 divisors (see below), whose sum is σ = 137209788. Its totient is φ = 45210544.

The previous prime is 90947137. The next prime is 90947141. The reversal of 90947138 is 83174909.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 89170249 + 1776889 = 9443^2 + 1333^2 .

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

It is a junction number, because it is equal to n+sod(n) for n = 90947095 and 90947104.

It is not an unprimeable number, because it can be changed into a prime (90947137) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 131081 + ... + 131772.

Almost surely, 2^90947138 is an apocalyptic number.

90947138 is a deficient number, since it is larger than the sum of its proper divisors (46262650).

90947138 is a wasteful number, since it uses less digits than its factorization.

90947138 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 263028.

The product of its (nonzero) digits is 54432, while the sum is 41.

The square root of 90947138 is about 9536.6208900218. The cubic root of 90947138 is about 449.7070323532.

The spelling of 90947138 in words is "ninety million, nine hundred forty-seven thousand, one hundred thirty-eight".