71485831 has 2 divisors, whose sum is σ = 71485832. Its totient is φ = 71485830.

The previous prime is 71485829. The next prime is 71485861. The reversal of 71485831 is 13858417.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 71485831 - 2¹ = 71485829 is a prime.

It is a super-3 number, since 3×71485831³ (a number of 25 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

Together with 71485829, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (71485861) 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, 35742915 + 35742916.

It is an arithmetic number, because the mean of its divisors is an integer number (35742916).

Almost surely, 2^71485831 is an apocalyptic number.

71485831 is a deficient number, since it is larger than the sum of its proper divisors (1).

71485831 is an equidigital number, since it uses as much as digits as its factorization.

71485831 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 26880, while the sum is 37.

The square root of 71485831 is about 8454.9293905981. The cubic root of 71485831 is about 415.0241065979.

The spelling of 71485831 in words is "seventy-one million, four hundred eighty-five thousand, eight hundred thirty-one".