71847487 has 2 divisors, whose sum is σ = 71847488. Its totient is φ = 71847486.

The previous prime is 71847481. The next prime is 71847499. The reversal of 71847487 is 78474817.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 71847487 - 2⁷ = 71847359 is a prime.

It is a super-2 number, since 2×71847487² = 10324122776430338, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (71847481) 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, 35923743 + 35923744.

It is an arithmetic number, because the mean of its divisors is an integer number (35923744).

Almost surely, 2^71847487 is an apocalyptic number.

71847487 is a deficient number, since it is larger than the sum of its proper divisors (1).

71847487 is an equidigital number, since it uses as much as digits as its factorization.

71847487 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 351232, while the sum is 46.

The square root of 71847487 is about 8476.2896953797. The cubic root of 71847487 is about 415.7228163841.

It can be divided in two parts, 718 and 47487, that added together give a triangular number (48205 = T₃₁₀).

The spelling of 71847487 in words is "seventy-one million, eight hundred forty-seven thousand, four hundred eighty-seven".