90492789 has 16 divisors (see below), whose sum is σ = 125997120. Its totient is φ = 57697920.

The previous prime is 90492761. The next prime is 90492799. The reversal of 90492789 is 98729409.

It is a happy number.

It is a de Polignac number, because none of the positive numbers 2^k-90492789 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (90492709) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4449 + ... + 14169.

It is an arithmetic number, because the mean of its divisors is an integer number (7874820).

Almost surely, 2^90492789 is an apocalyptic number.

It is an amenable number.

90492789 is a deficient number, since it is larger than the sum of its proper divisors (35504331).

90492789 is a wasteful number, since it uses less digits than its factorization.

90492789 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9860.

The product of its (nonzero) digits is 326592, while the sum is 48.

The square root of 90492789 is about 9512.7697859246. The cubic root of 90492789 is about 448.9569074537.

The spelling of 90492789 in words is "ninety million, four hundred ninety-two thousand, seven hundred eighty-nine".