71904491069 has 2 divisors, whose sum is σ = 71904491070. Its totient is φ = 71904491068.

The previous prime is 71904491063. The next prime is 71904491111. The reversal of 71904491069 is 96019440917.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 46251663844 + 25652827225 = 215062^2 + 160165^2 .

It is a cyclic number.

It is not a de Polignac number, because 71904491069 - 2²⁰ = 71903442493 is a prime.

It is a super-2 number, since 2×71904491069² (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 (71904491063) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35952245534 + 35952245535.

It is an arithmetic number, because the mean of its divisors is an integer number (35952245535).

Almost surely, 2^71904491069 is an apocalyptic number.

It is an amenable number.

71904491069 is a deficient number, since it is larger than the sum of its proper divisors (1).

71904491069 is an equidigital number, since it uses as much as digits as its factorization.

71904491069 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 489888, while the sum is 50.

The spelling of 71904491069 in words is "seventy-one billion, nine hundred four million, four hundred ninety-one thousand, sixty-nine".