90022129 has 4 divisors (see below), whose sum is σ = 90574576. Its totient is φ = 89469684.

The previous prime is 90022117. The next prime is 90022139. The reversal of 90022129 is 92122009.

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 90022129 - 2¹⁹ = 89497841 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (90022139) 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, 275979 + ... + 276304.

It is an arithmetic number, because the mean of its divisors is an integer number (22643644).

Almost surely, 2^90022129 is an apocalyptic number.

It is an amenable number.

90022129 is a deficient number, since it is larger than the sum of its proper divisors (552447).

90022129 is a wasteful number, since it uses less digits than its factorization.

90022129 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 552446.

The product of its (nonzero) digits is 648, while the sum is 25.

The square root of 90022129 is about 9487.9992095278. Note that the first 3 decimals coincide. The cubic root of 90022129 is about 448.1772009072.

The spelling of 90022129 in words is "ninety million, twenty-two thousand, one hundred twenty-nine".