90772105 has 4 divisors (see below), whose sum is σ = 108926532. Its totient is φ = 72617680.

The previous prime is 90772103. The next prime is 90772147. The reversal of 90772105 is 50127709.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 40347904 + 50424201 = 6352^2 + 7101^2 .

It is not a de Polignac number, because 90772105 - 2¹ = 90772103 is a prime.

It is a super-2 number, since 2×90772105² = 16479150092262050, which contains 22 as substring.

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 (90772103) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9077206 + ... + 9077215.

It is an arithmetic number, because the mean of its divisors is an integer number (27231633).

Almost surely, 2^90772105 is an apocalyptic number.

It is an amenable number.

90772105 is a deficient number, since it is larger than the sum of its proper divisors (18154427).

90772105 is a wasteful number, since it uses less digits than its factorization.

90772105 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18154426.

The product of its (nonzero) digits is 4410, while the sum is 31.

The square root of 90772105 is about 9527.4395825951. The cubic root of 90772105 is about 449.4183513932.

The spelling of 90772105 in words is "ninety million, seven hundred seventy-two thousand, one hundred five".