71869247 has 2 divisors, whose sum is σ = 71869248. Its totient is φ = 71869246.

The previous prime is 71869199. The next prime is 71869261. The reversal of 71869247 is 74296817.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 71869247 - 2⁸ = 71868991 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 71869198 and 71869207.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (71865247) 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, 35934623 + 35934624.

It is an arithmetic number, because the mean of its divisors is an integer number (35934624).

Almost surely, 2^71869247 is an apocalyptic number.

71869247 is a deficient number, since it is larger than the sum of its proper divisors (1).

71869247 is an equidigital number, since it uses as much as digits as its factorization.

71869247 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 169344, while the sum is 44.

The square root of 71869247 is about 8477.5731786874. The cubic root of 71869247 is about 415.7647812728.

The spelling of 71869247 in words is "seventy-one million, eight hundred sixty-nine thousand, two hundred forty-seven".