90727513 has 4 divisors (see below), whose sum is σ = 91065060. Its totient is φ = 90389968.

The previous prime is 90727501. The next prime is 90727523. The reversal of 90727513 is 31572709.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 40487769 + 50239744 = 6363^2 + 7088^2 .

It is a cyclic number.

It is not a de Polignac number, because 90727513 - 2²¹ = 88630361 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (90727523) 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, 168370 + ... + 168907.

It is an arithmetic number, because the mean of its divisors is an integer number (22766265).

Almost surely, 2^90727513 is an apocalyptic number.

It is an amenable number.

90727513 is a deficient number, since it is larger than the sum of its proper divisors (337547).

90727513 is a wasteful number, since it uses less digits than its factorization.

90727513 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 337546.

The product of its (nonzero) digits is 13230, while the sum is 34.

The square root of 90727513 is about 9525.0991070959. The cubic root of 90727513 is about 449.3447467484.

The spelling of 90727513 in words is "ninety million, seven hundred twenty-seven thousand, five hundred thirteen".