71989337093 has 2 divisors, whose sum is σ = 71989337094. Its totient is φ = 71989337092.

The previous prime is 71989337053. The next prime is 71989337141. The reversal of 71989337093 is 39073398917.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 37437219169 + 34552117924 = 193487^2 + 185882^2 .

It is a cyclic number.

It is not a de Polignac number, because 71989337093 - 2¹⁴ = 71989320709 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (71989337053) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35994668546 + 35994668547.

It is an arithmetic number, because the mean of its divisors is an integer number (35994668547).

Almost surely, 2^71989337093 is an apocalyptic number.

It is an amenable number.

71989337093 is a deficient number, since it is larger than the sum of its proper divisors (1).

71989337093 is an equidigital number, since it uses as much as digits as its factorization.

71989337093 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 7715736, while the sum is 59.

The spelling of 71989337093 in words is "seventy-one billion, nine hundred eighty-nine million, three hundred thirty-seven thousand, ninety-three".