913661 has 4 divisors (see below), whose sum is σ = 1044192. Its totient is φ = 783132.

The previous prime is 913639. The next prime is 913687. The reversal of 913661 is 166319.

913661 is nontrivially palindromic in base 16.

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 not a de Polignac number, because 913661 - 2¹⁸ = 651517 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 913661.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 913661.

It is not an unprimeable number, because it can be changed into a prime (910661) 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, 65255 + ... + 65268.

It is an arithmetic number, because the mean of its divisors is an integer number (261048).

2⁹¹³⁶⁶¹ is an apocalyptic number.

It is an amenable number.

913661 is a deficient number, since it is larger than the sum of its proper divisors (130531).

913661 is a wasteful number, since it uses less digits than its factorization.

913661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 130530.

The product of its digits is 972, while the sum is 26.

The square root of 913661 is about 955.8561607271. The cubic root of 913661 is about 97.0349893258.

The spelling of 913661 in words is "nine hundred thirteen thousand, six hundred sixty-one".