81697583083 has 2 divisors, whose sum is σ = 81697583084. Its totient is φ = 81697583082.

The previous prime is 81697583081. The next prime is 81697583089. The reversal of 81697583083 is 38038579618.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 81697583083 - 2¹ = 81697583081 is a prime.

Together with 81697583081, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (81697583081) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40848791541 + 40848791542.

It is an arithmetic number, because the mean of its divisors is an integer number (40848791542).

Almost surely, 2^81697583083 is an apocalyptic number.

81697583083 is a deficient number, since it is larger than the sum of its proper divisors (1).

81697583083 is an equidigital number, since it uses as much as digits as its factorization.

81697583083 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 8709120, while the sum is 58.

The spelling of 81697583083 in words is "eighty-one billion, six hundred ninety-seven million, five hundred eighty-three thousand, eighty-three".