81826923 has 16 divisors (see below), whose sum is σ = 111830400. Its totient is φ = 53202240.

The previous prime is 81826909. The next prime is 81826957. The reversal of 81826923 is 32962818.

It is a happy number.

It is not a de Polignac number, because 81826923 - 2⁴ = 81826907 is a prime.

It is not an unprimeable number, because it can be changed into a prime (81826963) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 21423 + ... + 24951.

It is an arithmetic number, because the mean of its divisors is an integer number (6989400).

Almost surely, 2^81826923 is an apocalyptic number.

81826923 is a deficient number, since it is larger than the sum of its proper divisors (30003477).

81826923 is a wasteful number, since it uses less digits than its factorization.

81826923 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3722.

The product of its digits is 41472, while the sum is 39.

The square root of 81826923 is about 9045.8235114333. The cubic root of 81826923 is about 434.1422707415.

The spelling of 81826923 in words is "eighty-one million, eight hundred twenty-six thousand, nine hundred twenty-three".