90423794 has 4 divisors (see below), whose sum is σ = 135635694. Its totient is φ = 45211896.

The previous prime is 90423791. The next prime is 90423821. The reversal of 90423794 is 49732409.

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

It can be written as a sum of positive squares in only one way, i.e., 73736569 + 16687225 = 8587^2 + 4085^2 .

It is not an unprimeable number, because it can be changed into a prime (90423791) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 22605947 + ... + 22605950.

Almost surely, 2^90423794 is an apocalyptic number.

90423794 is a deficient number, since it is larger than the sum of its proper divisors (45211900).

90423794 is a wasteful number, since it uses less digits than its factorization.

90423794 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45211899.

The product of its (nonzero) digits is 54432, while the sum is 38.

The square root of 90423794 is about 9509.1426532574. The cubic root of 90423794 is about 448.8427780744.

The spelling of 90423794 in words is "ninety million, four hundred twenty-three thousand, seven hundred ninety-four".