90513539 has 4 divisors (see below), whose sum is σ = 91659360. Its totient is φ = 89367720.

The previous prime is 90513517. The next prime is 90513541. The reversal of 90513539 is 93531509.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 93531509 = 19 ⋅4922711.

It is a cyclic number.

It is not a de Polignac number, because 90513539 - 2¹² = 90509443 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 90513499 and 90513508.

It is not an unprimeable number, because it can be changed into a prime (90513589) 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, 572792 + ... + 572949.

It is an arithmetic number, because the mean of its divisors is an integer number (22914840).

Almost surely, 2^90513539 is an apocalyptic number.

90513539 is a deficient number, since it is larger than the sum of its proper divisors (1145821).

90513539 is a wasteful number, since it uses less digits than its factorization.

90513539 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1145820.

The product of its (nonzero) digits is 18225, while the sum is 35.

The square root of 90513539 is about 9513.8603626499. The cubic root of 90513539 is about 448.9912201100.

The spelling of 90513539 in words is "ninety million, five hundred thirteen thousand, five hundred thirty-nine".