71715749 has 8 divisors (see below), whose sum is σ = 83705088. Its totient is φ = 60162480.

The previous prime is 71715737. The next prime is 71715773. The reversal of 71715749 is 94751717.

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

It is a de Polignac number, because none of the positive numbers 2^k-71715749 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 (71715779) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 108662 + ... + 109319.

It is an arithmetic number, because the mean of its divisors is an integer number (10463136).

Almost surely, 2^71715749 is an apocalyptic number.

It is an amenable number.

71715749 is a deficient number, since it is larger than the sum of its proper divisors (11989339).

71715749 is a wasteful number, since it uses less digits than its factorization.

71715749 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 218035.

The product of its digits is 61740, while the sum is 41.

The square root of 71715749 is about 8468.5151591055. The cubic root of 71715749 is about 415.4685741380.

The spelling of 71715749 in words is "seventy-one million, seven hundred fifteen thousand, seven hundred forty-nine".