90780833 has 32 divisors (see below), whose sum is σ = 114307200. Its totient is φ = 70824960.

The previous prime is 90780797. The next prime is 90780887. The reversal of 90780833 is 33808709.

It is a cyclic number.

It is not a de Polignac number, because 90780833 - 2⁸ = 90780577 is a prime.

It is a Smith number, since the sum of its digits (38) 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 (90789833) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 259943 + ... + 260291.

It is an arithmetic number, because the mean of its divisors is an integer number (3572100).

Almost surely, 2^90780833 is an apocalyptic number.

It is an amenable number.

90780833 is a deficient number, since it is larger than the sum of its proper divisors (23526367).

90780833 is a wasteful number, since it uses less digits than its factorization.

90780833 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 497.

The product of its (nonzero) digits is 36288, while the sum is 38.

The square root of 90780833 is about 9527.8976169982. The cubic root of 90780833 is about 449.4327552223.

The spelling of 90780833 in words is "ninety million, seven hundred eighty thousand, eight hundred thirty-three".