913561 has 8 divisors (see below), whose sum is σ = 1016064. Its totient is φ = 814320.

The previous prime is 913513. The next prime is 913571. The reversal of 913561 is 165319.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 913561 - 2⁷ = 913433 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (913571) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 201 + ... + 1366.

It is an arithmetic number, because the mean of its divisors is an integer number (127008).

2⁹¹³⁵⁶¹ is an apocalyptic number.

It is an amenable number.

913561 is a deficient number, since it is larger than the sum of its proper divisors (102503).

913561 is a wasteful number, since it uses less digits than its factorization.

913561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1631.

The product of its digits is 810, while the sum is 25.

The square root of 913561 is about 955.8038501701. The cubic root of 913561 is about 97.0314490437.

The spelling of 913561 in words is "nine hundred thirteen thousand, five hundred sixty-one".