81700323 has 16 divisors (see below), whose sum is σ = 115315200. Its totient is φ = 51308640.

The previous prime is 81700291. The next prime is 81700343. The reversal of 81700323 is 32300718.

It is not a de Polignac number, because 81700323 - 2⁵ = 81700291 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 81700293 and 81700302.

It is not an unprimeable number, because it can be changed into a prime (81700343) 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, 6358 + ... + 14276.

It is an arithmetic number, because the mean of its divisors is an integer number (7207200).

Almost surely, 2^81700323 is an apocalyptic number.

81700323 is a deficient number, since it is larger than the sum of its proper divisors (33614877).

81700323 is a wasteful number, since it uses less digits than its factorization.

81700323 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8122.

The product of its (nonzero) digits is 1008, while the sum is 24.

The square root of 81700323 is about 9038.8230981694. The cubic root of 81700323 is about 433.9182581582.

The spelling of 81700323 in words is "eighty-one million, seven hundred thousand, three hundred twenty-three".