71871969 has 16 divisors (see below), whose sum is σ = 104896064. Its totient is φ = 43502400.

The previous prime is 71871949. The next prime is 71871979. The reversal of 71871969 is 96917817.

It is a happy number.

It is not a de Polignac number, because 71871969 - 2²³ = 63483361 is a prime.

It is a super-2 number, since 2×71871969² = 10331159855873922, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (71871929) 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, 12727 + ... + 17484.

It is an arithmetic number, because the mean of its divisors is an integer number (6556004).

Almost surely, 2^71871969 is an apocalyptic number.

It is an amenable number.

71871969 is a deficient number, since it is larger than the sum of its proper divisors (33024095).

71871969 is a wasteful number, since it uses less digits than its factorization.

71871969 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30288.

The product of its digits is 190512, while the sum is 48.

The square root of 71871969 is about 8477.7337183943. The cubic root of 71871969 is about 415.7700301449.

The spelling of 71871969 in words is "seventy-one million, eight hundred seventy-one thousand, nine hundred sixty-nine".