90745513 has 4 divisors (see below), whose sum is σ = 90771840. Its totient is φ = 90719188.

The previous prime is 90745493. The next prime is 90745517. The reversal of 90745513 is 31554709.

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.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-90745513 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (90745517) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7045 + ... + 15202.

It is an arithmetic number, because the mean of its divisors is an integer number (22692960).

Almost surely, 2^90745513 is an apocalyptic number.

It is an amenable number.

90745513 is a deficient number, since it is larger than the sum of its proper divisors (26327).

90745513 is a wasteful number, since it uses less digits than its factorization.

90745513 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26326.

The product of its (nonzero) digits is 18900, while the sum is 34.

The square root of 90745513 is about 9526.0439322942. The cubic root of 90745513 is about 449.3744608903.

The spelling of 90745513 in words is "ninety million, seven hundred forty-five thousand, five hundred thirteen".