90134881 has 4 divisors (see below), whose sum is σ = 91612564. Its totient is φ = 88657200.

The previous prime is 90134819. The next prime is 90134897. The reversal of 90134881 is 18843109.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 11971600 + 78163281 = 3460^2 + 8841^2 .

It is a cyclic number.

It is not a de Polignac number, because 90134881 - 2⁷ = 90134753 is a prime.

It is a super-2 number, since 2×90134881² = 16248593545768322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (90134381) 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, 738750 + ... + 738871.

It is an arithmetic number, because the mean of its divisors is an integer number (22903141).

Almost surely, 2^90134881 is an apocalyptic number.

It is an amenable number.

90134881 is a deficient number, since it is larger than the sum of its proper divisors (1477683).

90134881 is a wasteful number, since it uses less digits than its factorization.

90134881 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1477682.

The product of its (nonzero) digits is 6912, while the sum is 34.

The square root of 90134881 is about 9493.9391719138. The cubic root of 90134881 is about 448.3642356346.

The spelling of 90134881 in words is "ninety million, one hundred thirty-four thousand, eight hundred eighty-one".