90782783 has 16 divisors (see below), whose sum is σ = 111967296. Its totient is φ = 71677440.

The previous prime is 90782773. The next prime is 90782807. The reversal of 90782783 is 38728709.

It is a happy number.

It is a Cunningham number, because it is equal to 9528²-1.

It is a cyclic number.

It is not a de Polignac number, because 90782783 - 2⁴ = 90782767 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (90782723) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 66023 + ... + 67383.

It is an arithmetic number, because the mean of its divisors is an integer number (6997956).

Almost surely, 2^90782783 is an apocalyptic number.

90782783 is a deficient number, since it is larger than the sum of its proper divisors (21184513).

90782783 is a wasteful number, since it uses less digits than its factorization.

90782783 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2114.

The product of its (nonzero) digits is 169344, while the sum is 44.

The square root of 90782783 is about 9527.9999475231. Note that the first 4 decimals coincide. The cubic root of 90782783 is about 449.4359731835.

The spelling of 90782783 in words is "ninety million, seven hundred eighty-two thousand, seven hundred eighty-three".