81746323 has 2 divisors, whose sum is σ = 81746324. Its totient is φ = 81746322.

The previous prime is 81746321. The next prime is 81746351. The reversal of 81746323 is 32364718.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 81746323 - 2¹ = 81746321 is a prime.

It is a super-2 number, since 2×81746323² = 13364922648040658, which contains 22 as substring.

Together with 81746321, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (81746321) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40873161 + 40873162.

It is an arithmetic number, because the mean of its divisors is an integer number (40873162).

Almost surely, 2^81746323 is an apocalyptic number.

81746323 is a deficient number, since it is larger than the sum of its proper divisors (1).

81746323 is an equidigital number, since it uses as much as digits as its factorization.

81746323 is an evil number, because the sum of its binary digits is even.

The product of its digits is 24192, while the sum is 34.

The square root of 81746323 is about 9041.3673191614. The cubic root of 81746323 is about 433.9996796843. Note that the first 3 decimals are identical.

The spelling of 81746323 in words is "eighty-one million, seven hundred forty-six thousand, three hundred twenty-three".