81692 has 12 divisors (see below), whose sum is σ = 154056. Its totient is φ = 37680.

The previous prime is 81689. The next prime is 81701. The reversal of 81692 is 29618.

It is a Harshad number since it is a multiple of its sum of digits (26).

It is an alternating number because its digits alternate between even and odd.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 734 + ... + 837.

It is an arithmetic number, because the mean of its divisors is an integer number (12838).

2⁸¹⁶⁹² is an apocalyptic number.

It is an amenable number.

81692 is a deficient number, since it is larger than the sum of its proper divisors (72364).

81692 is a wasteful number, since it uses less digits than its factorization.

81692 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1588 (or 1586 counting only the distinct ones).

The product of its digits is 864, while the sum is 26.

The square root of 81692 is about 285.8181239880. The cubic root of 81692 is about 43.3903522907.

Adding to 81692 its sum of digits (26), we get a palindrome (81718).

The spelling of 81692 in words is "eighty-one thousand, six hundred ninety-two".