90012385 has 4 divisors (see below), whose sum is σ = 108014868. Its totient is φ = 72009904.

The previous prime is 90012361. The next prime is 90012397. The reversal of 90012385 is 58321009.

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 33281361 + 56731024 = 5769^2 + 7532^2 .

It is a cyclic number.

It is not a de Polignac number, because 90012385 - 2⁷ = 90012257 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9001234 + ... + 9001243.

It is an arithmetic number, because the mean of its divisors is an integer number (27003717).

Almost surely, 2^90012385 is an apocalyptic number.

It is an amenable number.

90012385 is a deficient number, since it is larger than the sum of its proper divisors (18002483).

90012385 is a wasteful number, since it uses less digits than its factorization.

90012385 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18002482.

The product of its (nonzero) digits is 2160, while the sum is 28.

The square root of 90012385 is about 9487.4857048641. The cubic root of 90012385 is about 448.1610300824.

The spelling of 90012385 in words is "ninety million, twelve thousand, three hundred eighty-five".