90291394 has 4 divisors (see below), whose sum is σ = 135437094. Its totient is φ = 45145696.

The previous prime is 90291379. The next prime is 90291419. The reversal of 90291394 is 49319209.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 49319209 = 101 ⋅488309.

It can be written as a sum of positive squares in only one way, i.e., 88115769 + 2175625 = 9387^2 + 1475^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 22572847 + ... + 22572850.

Almost surely, 2^90291394 is an apocalyptic number.

90291394 is a deficient number, since it is larger than the sum of its proper divisors (45145700).

90291394 is a wasteful number, since it uses less digits than its factorization.

90291394 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45145699.

The product of its (nonzero) digits is 17496, while the sum is 37.

The square root of 90291394 is about 9502.1783818238. The cubic root of 90291394 is about 448.6236034179.

The spelling of 90291394 in words is "ninety million, two hundred ninety-one thousand, three hundred ninety-four".