71667293 has 2 divisors, whose sum is σ = 71667294. Its totient is φ = 71667292.

The previous prime is 71667217. The next prime is 71667311. The reversal of 71667293 is 39276617.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 65723449 + 5943844 = 8107^2 + 2438^2 .

It is a cyclic number.

It is not a de Polignac number, because 71667293 - 2²² = 67472989 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 71667293.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (71664293) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35833646 + 35833647.

It is an arithmetic number, because the mean of its divisors is an integer number (35833647).

Almost surely, 2^71667293 is an apocalyptic number.

It is an amenable number.

71667293 is a deficient number, since it is larger than the sum of its proper divisors (1).

71667293 is an equidigital number, since it uses as much as digits as its factorization.

71667293 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 95256, while the sum is 41.

The square root of 71667293 is about 8465.6537254957. The cubic root of 71667293 is about 415.3749801861.

The spelling of 71667293 in words is "seventy-one million, six hundred sixty-seven thousand, two hundred ninety-three".