81430114397 has 2 divisors, whose sum is σ = 81430114398. Its totient is φ = 81430114396.

The previous prime is 81430114343. The next prime is 81430114453. The reversal of 81430114397 is 79341103418.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 47034331876 + 34395782521 = 216874^2 + 185461^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-81430114397 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (81430114697) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40715057198 + 40715057199.

It is an arithmetic number, because the mean of its divisors is an integer number (40715057199).

Almost surely, 2^81430114397 is an apocalyptic number.

It is an amenable number.

81430114397 is a deficient number, since it is larger than the sum of its proper divisors (1).

81430114397 is an equidigital number, since it uses as much as digits as its factorization.

81430114397 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 72576, while the sum is 41.

The spelling of 81430114397 in words is "eighty-one billion, four hundred thirty million, one hundred fourteen thousand, three hundred ninety-seven".