90636517 has 4 divisors (see below), whose sum is σ = 95406880. Its totient is φ = 85866156.

The previous prime is 90636499. The next prime is 90636521. The reversal of 90636517 is 71563609.

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: 71563609 = 13 ⋅5504893.

It is a cyclic number.

It is not a de Polignac number, because 90636517 - 2¹¹ = 90634469 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 (90636547) 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, 2385153 + ... + 2385190.

It is an arithmetic number, because the mean of its divisors is an integer number (23851720).

Almost surely, 2^90636517 is an apocalyptic number.

It is an amenable number.

90636517 is a deficient number, since it is larger than the sum of its proper divisors (4770363).

90636517 is a wasteful number, since it uses less digits than its factorization.

90636517 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4770362.

The product of its (nonzero) digits is 34020, while the sum is 37.

The square root of 90636517 is about 9520.3212655876. The cubic root of 90636517 is about 449.1944716712.

The spelling of 90636517 in words is "ninety million, six hundred thirty-six thousand, five hundred seventeen".