90000122 has 4 divisors (see below), whose sum is σ = 135000186. Its totient is φ = 45000060.

The previous prime is 90000121. The next prime is 90000133. The reversal of 90000122 is 22100009.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 22100009 = 307 ⋅71987.

It can be written as a sum of positive squares in only one way, i.e., 70543201 + 19456921 = 8399^2 + 4411^2 .

It is a junction number, because it is equal to n+sod(n) for n = 90000097 and 90000106.

It is not an unprimeable number, because it can be changed into a prime (90000121) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 22500029 + ... + 22500032.

Almost surely, 2^90000122 is an apocalyptic number.

90000122 is a deficient number, since it is larger than the sum of its proper divisors (45000064).

90000122 is a wasteful number, since it uses less digits than its factorization.

90000122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45000063.

The product of its (nonzero) digits is 36, while the sum is 14.

The square root of 90000122 is about 9486.8394104675. The cubic root of 90000122 is about 448.1406771487.

The spelling of 90000122 in words is "ninety million, one hundred twenty-two", and thus it is an aban number.