71856443 has 2 divisors, whose sum is σ = 71856444. Its totient is φ = 71856442.

The previous prime is 71856427. The next prime is 71856451. The reversal of 71856443 is 34465817.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 71856443 - 2⁴ = 71856427 is a prime.

It is a super-2 number, since 2×71856443² = 10326696801224498, which contains 22 as substring.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 71856397 and 71856406.

It is not a weakly prime, because it can be changed into another prime (71856493) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35928221 + 35928222.

It is an arithmetic number, because the mean of its divisors is an integer number (35928222).

Almost surely, 2^71856443 is an apocalyptic number.

71856443 is a deficient number, since it is larger than the sum of its proper divisors (1).

71856443 is an equidigital number, since it uses as much as digits as its factorization.

71856443 is an evil number, because the sum of its binary digits is even.

The product of its digits is 80640, while the sum is 38.

The square root of 71856443 is about 8476.8179761040. The cubic root of 71856443 is about 415.7400893559.

The spelling of 71856443 in words is "seventy-one million, eight hundred fifty-six thousand, four hundred forty-three".