71717749 has 8 divisors (see below), whose sum is σ = 75525120. Its totient is φ = 67967856.

The previous prime is 71717743. The next prime is 71717773. The reversal of 71717749 is 94771717.

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

It is a cyclic number.

It is not a de Polignac number, because 71717749 - 2¹⁵ = 71684981 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 (71717743) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11797 + ... + 16810.

It is an arithmetic number, because the mean of its divisors is an integer number (9440640).

Almost surely, 2^71717749 is an apocalyptic number.

It is an amenable number.

71717749 is a deficient number, since it is larger than the sum of its proper divisors (3807371).

71717749 is a wasteful number, since it uses less digits than its factorization.

71717749 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28739.

The product of its digits is 86436, while the sum is 43.

The square root of 71717749 is about 8468.6332427376. The cubic root of 71717749 is about 415.4724362810.

The spelling of 71717749 in words is "seventy-one million, seven hundred seventeen thousand, seven hundred forty-nine".