71724887 has 16 divisors (see below), whose sum is σ = 82141920. Its totient is φ = 62257536.

The previous prime is 71724881. The next prime is 71724899. The reversal of 71724887 is 78842717.

It is not a de Polignac number, because 71724887 - 2⁴ = 71724871 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71724881) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 63308 + ... + 64430.

It is an arithmetic number, because the mean of its divisors is an integer number (5133870).

Almost surely, 2^71724887 is an apocalyptic number.

71724887 is a deficient number, since it is larger than the sum of its proper divisors (10417033).

71724887 is a wasteful number, since it uses less digits than its factorization.

71724887 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1187 (or 1153 counting only the distinct ones).

The product of its digits is 175616, while the sum is 44.

The square root of 71724887 is about 8469.0546697964. The cubic root of 71724887 is about 415.4862196838.

The spelling of 71724887 in words is "seventy-one million, seven hundred twenty-four thousand, eight hundred eighty-seven".