82749717 has 12 divisors (see below), whose sum is σ = 120043404. Its totient is φ = 54928320.

The previous prime is 82749713. The next prime is 82749739. The reversal of 82749717 is 71794728.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 20875761 + 61873956 = 4569^2 + 7866^2 .

It is not a de Polignac number, because 82749717 - 2² = 82749713 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (82749713) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 17634 + ... + 21827.

It is an arithmetic number, because the mean of its divisors is an integer number (10003617).

Almost surely, 2^82749717 is an apocalyptic number.

It is an amenable number.

82749717 is a deficient number, since it is larger than the sum of its proper divisors (37293687).

82749717 is a wasteful number, since it uses less digits than its factorization.

82749717 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39700 (or 39697 counting only the distinct ones).

The product of its digits is 197568, while the sum is 45.

The square root of 82749717 is about 9096.6871442300. The cubic root of 82749717 is about 435.7681710196.

The spelling of 82749717 in words is "eighty-two million, seven hundred forty-nine thousand, seven hundred seventeen".