90813247 has 8 divisors (see below), whose sum is σ = 103856256. Its totient is φ = 77787672.

The previous prime is 90813227. The next prime is 90813251. The reversal of 90813247 is 74231809.

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 90813247 - 2¹⁵ = 90780479 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (90813227) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9948 + ... + 16750.

It is an arithmetic number, because the mean of its divisors is an integer number (12982032).

Almost surely, 2^90813247 is an apocalyptic number.

90813247 is a deficient number, since it is larger than the sum of its proper divisors (13043009).

90813247 is a wasteful number, since it uses less digits than its factorization.

90813247 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8717.

The product of its (nonzero) digits is 12096, while the sum is 34.

The square root of 90813247 is about 9529.5984700301. The cubic root of 90813247 is about 449.4862400066.

The spelling of 90813247 in words is "ninety million, eight hundred thirteen thousand, two hundred forty-seven".