81082999 has 2 divisors, whose sum is σ = 81083000. Its totient is φ = 81082998.

The previous prime is 81082957. The next prime is 81083003. The reversal of 81082999 is 99928018.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-81082999 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (81082399) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40541499 + 40541500.

It is an arithmetic number, because the mean of its divisors is an integer number (40541500).

Almost surely, 2^81082999 is an apocalyptic number.

81082999 is a deficient number, since it is larger than the sum of its proper divisors (1).

81082999 is an equidigital number, since it uses as much as digits as its factorization.

81082999 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 93312, while the sum is 46.

The square root of 81082999 is about 9004.6098749474. The cubic root of 81082999 is about 432.8226049303.

The spelling of 81082999 in words is "eighty-one million, eighty-two thousand, nine hundred ninety-nine".