71874857 has 2 divisors, whose sum is σ = 71874858. Its totient is φ = 71874856.

The previous prime is 71874823. The next prime is 71874871. The reversal of 71874857 is 75847817.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 45414121 + 26460736 = 6739^2 + 5144^2 .

It is a cyclic number.

It is not a de Polignac number, because 71874857 - 2⁸ = 71874601 is a prime.

It is not a weakly prime, because it can be changed into another prime (71874877) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35937428 + 35937429.

It is an arithmetic number, because the mean of its divisors is an integer number (35937429).

Almost surely, 2^71874857 is an apocalyptic number.

It is an amenable number.

71874857 is a deficient number, since it is larger than the sum of its proper divisors (1).

71874857 is an equidigital number, since it uses as much as digits as its factorization.

71874857 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 439040, while the sum is 47.

The square root of 71874857 is about 8477.9040452225. The cubic root of 71874857 is about 415.7755989723.

The spelling of 71874857 in words is "seventy-one million, eight hundred seventy-four thousand, eight hundred fifty-seven".