90031042 has 4 divisors (see below), whose sum is σ = 135046566. Its totient is φ = 45015520.

The previous prime is 90031033. The next prime is 90031043. The reversal of 90031042 is 24013009.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 24013009 = 577 ⋅41617.

It can be written as a sum of positive squares in only one way, i.e., 62583921 + 27447121 = 7911^2 + 5239^2 .

It is not an unprimeable number, because it can be changed into a prime (90031043) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 22507759 + ... + 22507762.

Almost surely, 2^90031042 is an apocalyptic number.

90031042 is a deficient number, since it is larger than the sum of its proper divisors (45015524).

90031042 is a wasteful number, since it uses less digits than its factorization.

90031042 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45015523.

The product of its (nonzero) digits is 216, while the sum is 19.

The square root of 90031042 is about 9488.4688965080. The cubic root of 90031042 is about 448.1919916096.

The spelling of 90031042 in words is "ninety million, thirty-one thousand, forty-two".