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91513 is a prime number
BaseRepresentation
bin10110010101111001
311122112101
4112111321
510412023
61543401
7530542
oct262571
9148471
1091513
1162834
1244b61
1332866
14254c9
151c1ad
hex16579

91513 has 2 divisors, whose sum is σ = 91514. Its totient is φ = 91512.

The previous prime is 91499. The next prime is 91529. The reversal of 91513 is 31519.

It is the 124-th star number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 56169 + 35344 = 237^2 + 188^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2k-91513 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (91573) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45756 + 45757.

It is an arithmetic number, because the mean of its divisors is an integer number (45757).

291513 is an apocalyptic number.

It is an amenable number.

91513 is a deficient number, since it is larger than the sum of its proper divisors (1).

91513 is an equidigital number, since it uses as much as digits as its factorization.

91513 is an evil number, because the sum of its binary digits is even.

The product of its digits is 135, while the sum is 19.

The square root of 91513 is about 302.5111568191. The cubic root of 91513 is about 45.0637778785.

Subtracting from 91513 its product of digits (135), we obtain a triangular number (91378 = T427).

The spelling of 91513 in words is "ninety-one thousand, five hundred thirteen".