90790774 has 4 divisors (see below), whose sum is σ = 136186164. Its totient is φ = 45395386.

The previous prime is 90790747. The next prime is 90790783. The reversal of 90790774 is 47709709.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 47709709 = 127 ⋅375667.

It is a self number, because there is not a number n which added to its sum of digits gives 90790774.

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, 22697692 + ... + 22697695.

It is an arithmetic number, because the mean of its divisors is an integer number (34046541).

Almost surely, 2^90790774 is an apocalyptic number.

90790774 is a deficient number, since it is larger than the sum of its proper divisors (45395390).

90790774 is a wasteful number, since it uses less digits than its factorization.

90790774 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45395389.

The product of its (nonzero) digits is 111132, while the sum is 43.

The square root of 90790774 is about 9528.4192812869. The cubic root of 90790774 is about 449.4491597422.

The spelling of 90790774 in words is "ninety million, seven hundred ninety thousand, seven hundred seventy-four".