813916 has 12 divisors (see below), whose sum is σ = 1446088. Its totient is φ = 400752.

The previous prime is 813907. The next prime is 813931. The reversal of 813916 is 619318.

It is a happy number.

It is a hoax number, since the sum of its digits (28) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 1251 + ... + 1786.

2⁸¹³⁹¹⁶ is an apocalyptic number.

It is an amenable number.

813916 is a deficient number, since it is larger than the sum of its proper divisors (632172).

813916 is a wasteful number, since it uses less digits than its factorization.

813916 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3108 (or 3106 counting only the distinct ones).

The product of its digits is 1296, while the sum is 28.

The square root of 813916 is about 902.1729324248. The cubic root of 813916 is about 93.3669550071.

It can be divided in two parts, 8 and 13916, that added together give a square (13924 = 118²).

The spelling of 813916 in words is "eight hundred thirteen thousand, nine hundred sixteen".