71512997399 has 2 divisors, whose sum is σ = 71512997400. Its totient is φ = 71512997398.

The previous prime is 71512997377. The next prime is 71512997407. The reversal of 71512997399 is 99379921517.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-71512997399 is a prime.

It is a super-2 number, since 2×71512997399² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (71512997099) 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, 35756498699 + 35756498700.

It is an arithmetic number, because the mean of its divisors is an integer number (35756498700).

Almost surely, 2^71512997399 is an apocalyptic number.

71512997399 is a deficient number, since it is larger than the sum of its proper divisors (1).

71512997399 is an equidigital number, since it uses as much as digits as its factorization.

71512997399 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 9644670, while the sum is 62.

The spelling of 71512997399 in words is "seventy-one billion, five hundred twelve million, nine hundred ninety-seven thousand, three hundred ninety-nine".