90784765 has 8 divisors (see below), whose sum is σ = 109906488. Its totient is φ = 71984640.

The previous prime is 90784753. The next prime is 90784801. The reversal of 90784765 is 56748709.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 857476 + 89927289 = 926^2 + 9483^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 90784765 - 2¹¹ = 90782717 is a prime.

It is a super-2 number, since 2×90784765² = 16483747112210450, which contains 22 as substring.

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 7 ways as a sum of consecutive naturals, for example, 79776 + ... + 80905.

It is an arithmetic number, because the mean of its divisors is an integer number (13738311).

Almost surely, 2^90784765 is an apocalyptic number.

It is an amenable number.

90784765 is a deficient number, since it is larger than the sum of its proper divisors (19121723).

90784765 is a wasteful number, since it uses less digits than its factorization.

90784765 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 160799.

The product of its (nonzero) digits is 423360, while the sum is 46.

The square root of 90784765 is about 9528.1039561919. The cubic root of 90784765 is about 449.4392439051.

The spelling of 90784765 in words is "ninety million, seven hundred eighty-four thousand, seven hundred sixty-five".