81997110703 has 2 divisors, whose sum is σ = 81997110704. Its totient is φ = 81997110702.

The previous prime is 81997110677. The next prime is 81997110731. The reversal of 81997110703 is 30701179918.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-81997110703 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (81997110743) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40998555351 + 40998555352.

It is an arithmetic number, because the mean of its divisors is an integer number (40998555352).

Almost surely, 2^81997110703 is an apocalyptic number.

81997110703 is a deficient number, since it is larger than the sum of its proper divisors (1).

81997110703 is an equidigital number, since it uses as much as digits as its factorization.

81997110703 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 95256, while the sum is 46.

The spelling of 81997110703 in words is "eighty-one billion, nine hundred ninety-seven million, one hundred ten thousand, seven hundred three".