71893643 has 2 divisors, whose sum is σ = 71893644. Its totient is φ = 71893642.

The previous prime is 71893637. The next prime is 71893709. The reversal of 71893643 is 34639817.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 71893643 - 2⁶ = 71893579 is a prime.

It is a super-2 number, since 2×71893643² = 10337391807622898, which contains 22 as substring.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 71893643.

It is not a weakly prime, because it can be changed into another prime (71893243) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35946821 + 35946822.

It is an arithmetic number, because the mean of its divisors is an integer number (35946822).

Almost surely, 2^71893643 is an apocalyptic number.

71893643 is a deficient number, since it is larger than the sum of its proper divisors (1).

71893643 is an equidigital number, since it uses as much as digits as its factorization.

71893643 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 108864, while the sum is 41.

The square root of 71893643 is about 8479.0119117737. The cubic root of 71893643 is about 415.8118197052.

The spelling of 71893643 in words is "seventy-one million, eight hundred ninety-three thousand, six hundred forty-three".