90793217 has 8 divisors (see below), whose sum is σ = 91477512. Its totient is φ = 90112000.

The previous prime is 90793207. The next prime is 90793223. The reversal of 90793217 is 71239709.

It can be written as a sum of positive squares in 4 ways, for example, as 54745201 + 36048016 = 7399^2 + 6004^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 90793217 - 2⁴ = 90793201 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (90793207) 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 7 ways as a sum of consecutive naturals, for example, 102617 + ... + 103497.

It is an arithmetic number, because the mean of its divisors is an integer number (11434689).

Almost surely, 2^90793217 is an apocalyptic number.

It is an amenable number.

90793217 is a deficient number, since it is larger than the sum of its proper divisors (684295).

90793217 is a wasteful number, since it uses less digits than its factorization.

90793217 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1539.

The product of its (nonzero) digits is 23814, while the sum is 38.

The square root of 90793217 is about 9528.5474758748. The cubic root of 90793217 is about 449.4531909685.

The spelling of 90793217 in words is "ninety million, seven hundred ninety-three thousand, two hundred seventeen".