913663 has 4 divisors (see below), whose sum is σ = 943168. Its totient is φ = 884160.

The previous prime is 913639. The next prime is 913687. The reversal of 913663 is 366319.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 366319 = 337 ⋅1087.

It is an interprime number because it is at equal distance from previous prime (913639) and next prime (913687).

It is a cyclic number.

It is not a de Polignac number, because 913663 - 2⁹ = 913151 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (913063) 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, 14706 + ... + 14767.

It is an arithmetic number, because the mean of its divisors is an integer number (235792).

2⁹¹³⁶⁶³ is an apocalyptic number.

913663 is a deficient number, since it is larger than the sum of its proper divisors (29505).

913663 is a wasteful number, since it uses less digits than its factorization.

913663 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29504.

The product of its digits is 2916, while the sum is 28.

The square root of 913663 is about 955.8572069091. The cubic root of 913663 is about 97.0350601288.

It can be divided in two parts, 91 and 3663, that multiplied together give a palindrome (333333).

The spelling of 913663 in words is "nine hundred thirteen thousand, six hundred sixty-three".