71839099061 has 2 divisors, whose sum is σ = 71839099062. Its totient is φ = 71839099060.

The previous prime is 71839098977. The next prime is 71839099081. The reversal of 71839099061 is 16099093817.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 64005964036 + 7833135025 = 252994^2 + 88505^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-71839099061 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 71839098994 and 71839099012.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (71839099081) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35919549530 + 35919549531.

It is an arithmetic number, because the mean of its divisors is an integer number (35919549531).

Almost surely, 2^71839099061 is an apocalyptic number.

It is an amenable number.

71839099061 is a deficient number, since it is larger than the sum of its proper divisors (1).

71839099061 is an equidigital number, since it uses as much as digits as its factorization.

71839099061 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 734832, while the sum is 53.

The spelling of 71839099061 in words is "seventy-one billion, eight hundred thirty-nine million, ninety-nine thousand, sixty-one".