71964869 has 2 divisors, whose sum is σ = 71964870. Its totient is φ = 71964868.

The previous prime is 71964833. The next prime is 71964911. The reversal of 71964869 is 96846917.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 52736644 + 19228225 = 7262^2 + 4385^2 .

It is an emirp because it is prime and its reverse (96846917) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 71964869 - 2²⁴ = 55187653 is a prime.

It is a super-2 number, since 2×71964869² = 10357884740374322, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (71964829) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35982434 + 35982435.

It is an arithmetic number, because the mean of its divisors is an integer number (35982435).

Almost surely, 2^71964869 is an apocalyptic number.

It is an amenable number.

71964869 is a deficient number, since it is larger than the sum of its proper divisors (1).

71964869 is an equidigital number, since it uses as much as digits as its factorization.

71964869 is an evil number, because the sum of its binary digits is even.

The product of its digits is 653184, while the sum is 50.

The square root of 71964869 is about 8483.2110076315. The cubic root of 71964869 is about 415.9490911722.

The spelling of 71964869 in words is "seventy-one million, nine hundred sixty-four thousand, eight hundred sixty-nine".