90413845 has 4 divisors (see below), whose sum is σ = 108496620. Its totient is φ = 72331072.

The previous prime is 90413833. The next prime is 90413863. The reversal of 90413845 is 54831409.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 54831409 = 17 ⋅3225377.

It can be written as a sum of positive squares in 2 ways, for example, as 39162564 + 51251281 = 6258^2 + 7159^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-90413845 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 90413845.

It is a congruent 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, 9041380 + ... + 9041389.

It is an arithmetic number, because the mean of its divisors is an integer number (27124155).

Almost surely, 2^90413845 is an apocalyptic number.

It is an amenable number.

90413845 is a deficient number, since it is larger than the sum of its proper divisors (18082775).

90413845 is a wasteful number, since it uses less digits than its factorization.

90413845 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18082774.

The product of its (nonzero) digits is 17280, while the sum is 34.

The square root of 90413845 is about 9508.6195107387. The cubic root of 90413845 is about 448.8263159598.

The spelling of 90413845 in words is "ninety million, four hundred thirteen thousand, eight hundred forty-five".