71856767 has 2 divisors, whose sum is σ = 71856768. Its totient is φ = 71856766.

The previous prime is 71856737. The next prime is 71856769. The reversal of 71856767 is 76765817.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 71856767 - 2⁶ = 71856703 is a prime.

Together with 71856769, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (71856769) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35928383 + 35928384.

It is an arithmetic number, because the mean of its divisors is an integer number (35928384).

Almost surely, 2^71856767 is an apocalyptic number.

71856767 is a deficient number, since it is larger than the sum of its proper divisors (1).

71856767 is an equidigital number, since it uses as much as digits as its factorization.

71856767 is an evil number, because the sum of its binary digits is even.

The product of its digits is 493920, while the sum is 47.

The square root of 71856767 is about 8476.8370870272. The cubic root of 71856767 is about 415.7407142110.

The spelling of 71856767 in words is "seventy-one million, eight hundred fifty-six thousand, seven hundred sixty-seven".