81374074343 has 2 divisors, whose sum is σ = 81374074344. Its totient is φ = 81374074342.

The previous prime is 81374074339. The next prime is 81374074367. The reversal of 81374074343 is 34347047318.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 81374074343 - 2² = 81374074339 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 81374074294 and 81374074303.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (81374079343) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40687037171 + 40687037172.

It is an arithmetic number, because the mean of its divisors is an integer number (40687037172).

Almost surely, 2^81374074343 is an apocalyptic number.

81374074343 is a deficient number, since it is larger than the sum of its proper divisors (1).

81374074343 is an equidigital number, since it uses as much as digits as its factorization.

81374074343 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 677376, while the sum is 44.

The spelling of 81374074343 in words is "eighty-one billion, three hundred seventy-four million, seventy-four thousand, three hundred forty-three".