71204262989 has 2 divisors, whose sum is σ = 71204262990. Its totient is φ = 71204262988.

The previous prime is 71204262959. The next prime is 71204263007. The reversal of 71204262989 is 98926240217.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 51243376900 + 19960886089 = 226370^2 + 141283^2 .

It is a cyclic number.

It is not a de Polignac number, because 71204262989 - 2⁸ = 71204262733 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (71204262959) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35602131494 + 35602131495.

It is an arithmetic number, because the mean of its divisors is an integer number (35602131495).

Almost surely, 2^71204262989 is an apocalyptic number.

It is an amenable number.

71204262989 is a deficient number, since it is larger than the sum of its proper divisors (1).

71204262989 is an equidigital number, since it uses as much as digits as its factorization.

71204262989 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 870912, while the sum is 50.

The spelling of 71204262989 in words is "seventy-one billion, two hundred four million, two hundred sixty-two thousand, nine hundred eighty-nine".