71312693 has 2 divisors, whose sum is σ = 71312694. Its totient is φ = 71312692.

The previous prime is 71312669. The next prime is 71312737. The reversal of 71312693 is 39621317.

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., 61434244 + 9878449 = 7838^2 + 3143^2 .

It is a cyclic number.

It is not a de Polignac number, because 71312693 - 2⁶ = 71312629 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (71312393) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35656346 + 35656347.

It is an arithmetic number, because the mean of its divisors is an integer number (35656347).

Almost surely, 2^71312693 is an apocalyptic number.

It is an amenable number.

71312693 is a deficient number, since it is larger than the sum of its proper divisors (1).

71312693 is an equidigital number, since it uses as much as digits as its factorization.

71312693 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 6804, while the sum is 32.

The square root of 71312693 is about 8444.6843043420. The cubic root of 71312693 is about 414.6887742539.

The spelling of 71312693 in words is "seventy-one million, three hundred twelve thousand, six hundred ninety-three".