90397513 has 4 divisors (see below), whose sum is σ = 90550548. Its totient is φ = 90244480.

The previous prime is 90397507. The next prime is 90397523. The reversal of 90397513 is 31579309.

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 25321024 + 65076489 = 5032^2 + 8067^2 .

It is a cyclic number.

It is not a de Polignac number, because 90397513 - 2⁹ = 90397001 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (90397523) 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, 75628 + ... + 76813.

It is an arithmetic number, because the mean of its divisors is an integer number (22637637).

Almost surely, 2^90397513 is an apocalyptic number.

It is an amenable number.

90397513 is a deficient number, since it is larger than the sum of its proper divisors (153035).

90397513 is a wasteful number, since it uses less digits than its factorization.

90397513 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 153034.

The product of its (nonzero) digits is 25515, while the sum is 37.

The square root of 90397513 is about 9507.7606722088. The cubic root of 90397513 is about 448.7992895945.

The spelling of 90397513 in words is "ninety million, three hundred ninety-seven thousand, five hundred thirteen".