71929857 has 8 divisors (see below), whose sum is σ = 95947840. Its totient is φ = 47932560.

The previous prime is 71929853. The next prime is 71929861. The reversal of 71929857 is 75892917.

It is an interprime number because it is at equal distance from previous prime (71929853) and next prime (71929861).

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 71929857 - 2² = 71929853 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (71929853) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7119 + ... + 13947.

It is an arithmetic number, because the mean of its divisors is an integer number (11993480).

Almost surely, 2^71929857 is an apocalyptic number.

It is an amenable number.

71929857 is a deficient number, since it is larger than the sum of its proper divisors (24017983).

71929857 is a wasteful number, since it uses less digits than its factorization.

71929857 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10343.

The product of its digits is 317520, while the sum is 48.

The square root of 71929857 is about 8481.1471511818. The cubic root of 71929857 is about 415.8816250499.

The spelling of 71929857 in words is "seventy-one million, nine hundred twenty-nine thousand, eight hundred fifty-seven".