71800047 has 32 divisors (see below), whose sum is σ = 116881920. Its totient is φ = 43200000.

The previous prime is 71800021. The next prime is 71800073. The reversal of 71800047 is 74000817.

It is an interprime number because it is at equal distance from previous prime (71800021) and next prime (71800073).

It is not a de Polignac number, because 71800047 - 2⁶ = 71799983 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71800007) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 44047 + ... + 45647.

It is an arithmetic number, because the mean of its divisors is an integer number (3652560).

Almost surely, 2^71800047 is an apocalyptic number.

71800047 is a deficient number, since it is larger than the sum of its proper divisors (45081873).

71800047 is a wasteful number, since it uses less digits than its factorization.

71800047 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1772 (or 1766 counting only the distinct ones).

The product of its (nonzero) digits is 1568, while the sum is 27.

The square root of 71800047 is about 8473.4908390816. The cubic root of 71800047 is about 415.6312973738.

The spelling of 71800047 in words is "seventy-one million, eight hundred thousand, forty-seven".