71969829 has 16 divisors (see below), whose sum is σ = 101173632. Its totient is φ = 45416448.

The previous prime is 71969809. The next prime is 71969861. The reversal of 71969829 is 92896917.

It is a happy number.

It is not a de Polignac number, because 71969829 - 2⁵ = 71969797 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71969809) 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, 1317 + ... + 12069.

It is an arithmetic number, because the mean of its divisors is an integer number (6323352).

Almost surely, 2^71969829 is an apocalyptic number.

It is an amenable number.

71969829 is a deficient number, since it is larger than the sum of its proper divisors (29203803).

71969829 is a wasteful number, since it uses less digits than its factorization.

71969829 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10876.

The product of its digits is 489888, while the sum is 51.

The square root of 71969829 is about 8483.5033447273. The cubic root of 71969829 is about 415.9586470389.

The spelling of 71969829 in words is "seventy-one million, nine hundred sixty-nine thousand, eight hundred twenty-nine".