90436994 has 8 divisors (see below), whose sum is σ = 137179980. Its totient is φ = 44710336.

The previous prime is 90436967. The next prime is 90437023. The reversal of 90436994 is 49963409.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 78978769 + 11458225 = 8887^2 + 3385^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a Curzon 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, 253859 + ... + 254214.

Almost surely, 2^90436994 is an apocalyptic number.

90436994 is a deficient number, since it is larger than the sum of its proper divisors (46742986).

90436994 is a wasteful number, since it uses less digits than its factorization.

90436994 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 508164.

The product of its (nonzero) digits is 209952, while the sum is 44.

The square root of 90436994 is about 9509.8366968103. The cubic root of 90436994 is about 448.8646175931.

The spelling of 90436994 in words is "ninety million, four hundred thirty-six thousand, nine hundred ninety-four".