90766505 has 4 divisors (see below), whose sum is σ = 108919812. Its totient is φ = 72613200.

The previous prime is 90766499. The next prime is 90766517. The reversal of 90766505 is 50566709.

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 56145049 + 34621456 = 7493^2 + 5884^2 .

It is not a de Polignac number, because 90766505 - 2¹⁰ = 90765481 is a prime.

It is a Duffinian 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, 9076646 + ... + 9076655.

It is an arithmetic number, because the mean of its divisors is an integer number (27229953).

Almost surely, 2^90766505 is an apocalyptic number.

It is an amenable number.

90766505 is a deficient number, since it is larger than the sum of its proper divisors (18153307).

90766505 is a wasteful number, since it uses less digits than its factorization.

90766505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18153306.

The product of its (nonzero) digits is 56700, while the sum is 38.

The square root of 90766505 is about 9527.1456900795. The cubic root of 90766505 is about 449.4091092201.

The spelling of 90766505 in words is "ninety million, seven hundred sixty-six thousand, five hundred five".