90742793 has 4 divisors (see below), whose sum is σ = 90772500. Its totient is φ = 90713088.

The previous prime is 90742789. The next prime is 90742801. The reversal of 90742793 is 39724709.

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

It can be written as a sum of positive squares in 2 ways, for example, as 28601104 + 62141689 = 5348^2 + 7883^2 .

It is a cyclic number.

It is not a de Polignac number, because 90742793 - 2² = 90742789 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 90742793.

It is not an unprimeable number, because it can be changed into a prime (90742733) 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, 9668 + ... + 16581.

It is an arithmetic number, because the mean of its divisors is an integer number (22693125).

Almost surely, 2^90742793 is an apocalyptic number.

It is an amenable number.

90742793 is a deficient number, since it is larger than the sum of its proper divisors (29707).

90742793 is a wasteful number, since it uses less digits than its factorization.

90742793 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29706.

The product of its (nonzero) digits is 95256, while the sum is 41.

The square root of 90742793 is about 9525.9011647193. The cubic root of 90742793 is about 449.3699710054.

The spelling of 90742793 in words is "ninety million, seven hundred forty-two thousand, seven hundred ninety-three".