90325405 has 4 divisors (see below), whose sum is σ = 108390492. Its totient is φ = 72260320.

The previous prime is 90325387. The next prime is 90325423. The reversal of 90325405 is 50452309.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 50452309 = 1213 ⋅41593.

It is an interprime number because it is at equal distance from previous prime (90325387) and next prime (90325423).

It can be written as a sum of positive squares in 2 ways, for example, as 23707161 + 66618244 = 4869^2 + 8162^2 .

It is not a de Polignac number, because 90325405 - 2¹⁵ = 90292637 is a prime.

It is a Duffinian number.

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, 9032536 + ... + 9032545.

It is an arithmetic number, because the mean of its divisors is an integer number (27097623).

Almost surely, 2^90325405 is an apocalyptic number.

It is an amenable number.

90325405 is a deficient number, since it is larger than the sum of its proper divisors (18065087).

90325405 is a wasteful number, since it uses less digits than its factorization.

90325405 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18065086.

The product of its (nonzero) digits is 5400, while the sum is 28.

The square root of 90325405 is about 9503.9678555854. The cubic root of 90325405 is about 448.6799255887.

The spelling of 90325405 in words is "ninety million, three hundred twenty-five thousand, four hundred five".