74731871 has 2 divisors, whose sum is σ = 74731872. Its totient is φ = 74731870.

The previous prime is 74731861. The next prime is 74731873. The reversal of 74731871 is 17813747.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-74731871 is a prime.

Together with 74731873, 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 (74731873) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 37365935 + 37365936.

It is an arithmetic number, because the mean of its divisors is an integer number (37365936).

Almost surely, 2^74731871 is an apocalyptic number.

74731871 is a deficient number, since it is larger than the sum of its proper divisors (1).

74731871 is an equidigital number, since it uses as much as digits as its factorization.

74731871 is an evil number, because the sum of its binary digits is even.

The product of its digits is 32928, while the sum is 38.

The square root of 74731871 is about 8644.7597421791. The cubic root of 74731871 is about 421.2131797806.

The spelling of 74731871 in words is "seventy-four million, seven hundred thirty-one thousand, eight hundred seventy-one".