90747517 has 4 divisors (see below), whose sum is σ = 103711456. Its totient is φ = 77783580.

The previous prime is 90747511. The next prime is 90747523. The reversal of 90747517 is 71574709.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 71574709 = 17 ⋅4210277.

It is an interprime number because it is at equal distance from previous prime (90747511) and next prime (90747523).

It is not a de Polignac number, because 90747517 - 2¹¹ = 90745469 is a prime.

It is a super-2 number, since 2×90747517² = 16470223683330578, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 90747517.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (90747511) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6481959 + ... + 6481972.

It is an arithmetic number, because the mean of its divisors is an integer number (25927864).

Almost surely, 2^90747517 is an apocalyptic number.

It is an amenable number.

90747517 is a deficient number, since it is larger than the sum of its proper divisors (12963939).

90747517 is a wasteful number, since it uses less digits than its factorization.

90747517 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12963938.

The product of its (nonzero) digits is 61740, while the sum is 40.

The square root of 90747517 is about 9526.1491170357. The cubic root of 90747517 is about 449.3777688217.

The spelling of 90747517 in words is "ninety million, seven hundred forty-seven thousand, five hundred seventeen".