90572305 has 4 divisors (see below), whose sum is σ = 108686772. Its totient is φ = 72457840.

The previous prime is 90572303. The next prime is 90572323. The reversal of 90572305 is 50327509.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 50327509 = 211 ⋅238519.

It can be written as a sum of positive squares in 2 ways, for example, as 17007376 + 73564929 = 4124^2 + 8577^2 .

It is not a de Polignac number, because 90572305 - 2¹ = 90572303 is a prime.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (90572303) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9057226 + ... + 9057235.

It is an arithmetic number, because the mean of its divisors is an integer number (27171693).

Almost surely, 2^90572305 is an apocalyptic number.

It is an amenable number.

90572305 is a deficient number, since it is larger than the sum of its proper divisors (18114467).

90572305 is a wasteful number, since it uses less digits than its factorization.

90572305 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18114466.

The product of its (nonzero) digits is 9450, while the sum is 31.

The square root of 90572305 is about 9516.9483028963. The cubic root of 90572305 is about 449.0883684119.

The spelling of 90572305 in words is "ninety million, five hundred seventy-two thousand, three hundred five".