90742717 has 8 divisors (see below), whose sum is σ = 100107000. Its totient is φ = 81719040.

The previous prime is 90742699. The next prime is 90742733. The reversal of 90742717 is 71724709.

It can be written as a sum of positive squares in 4 ways, for example, as 9400356 + 81342361 = 3066^2 + 9019^2 .

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

It is not a de Polignac number, because 90742717 - 2¹¹ = 90740669 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (90742747) 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, 84592 + ... + 85657.

It is an arithmetic number, because the mean of its divisors is an integer number (12513375).

Almost surely, 2^90742717 is an apocalyptic number.

It is an amenable number.

90742717 is a deficient number, since it is larger than the sum of its proper divisors (9364283).

90742717 is a wasteful number, since it uses less digits than its factorization.

90742717 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 170303.

The product of its (nonzero) digits is 24696, while the sum is 37.

The square root of 90742717 is about 9525.8971755945. The cubic root of 90742717 is about 449.3698455514.

The spelling of 90742717 in words is "ninety million, seven hundred forty-two thousand, seven hundred seventeen".