90091142 has 4 divisors (see below), whose sum is σ = 135136716. Its totient is φ = 45045570.

The previous prime is 90091123. The next prime is 90091163. The reversal of 90091142 is 24119009.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 22522784 + ... + 22522787.

It is an arithmetic number, because the mean of its divisors is an integer number (33784179).

Almost surely, 2^90091142 is an apocalyptic number.

90091142 is a deficient number, since it is larger than the sum of its proper divisors (45045574).

90091142 is a wasteful number, since it uses less digits than its factorization.

90091142 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45045573.

The product of its (nonzero) digits is 648, while the sum is 26.

The square root of 90091142 is about 9491.6353701562. The cubic root of 90091142 is about 448.2916992458.

The spelling of 90091142 in words is "ninety million, ninety-one thousand, one hundred forty-two".