81470860039 has 2 divisors, whose sum is σ = 81470860040. Its totient is φ = 81470860038.

The previous prime is 81470860033. The next prime is 81470860063. The reversal of 81470860039 is 93006807418.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 81470860039 - 2⁵ = 81470860007 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (81470860033) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40735430019 + 40735430020.

It is an arithmetic number, because the mean of its divisors is an integer number (40735430020).

Almost surely, 2^81470860039 is an apocalyptic number.

81470860039 is a deficient number, since it is larger than the sum of its proper divisors (1).

81470860039 is an equidigital number, since it uses as much as digits as its factorization.

81470860039 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 290304, while the sum is 46.

The spelling of 81470860039 in words is "eighty-one billion, four hundred seventy million, eight hundred sixty thousand, thirty-nine".