82911749 has 4 divisors (see below), whose sum is σ = 84271020. Its totient is φ = 81552480.

The previous prime is 82911739. The next prime is 82911767. The reversal of 82911749 is 94711928.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 5207524 + 77704225 = 2282^2 + 8815^2 .

It is a cyclic number.

It is not a de Polignac number, because 82911749 - 2¹² = 82907653 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 (82911739) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 679544 + ... + 679665.

It is an arithmetic number, because the mean of its divisors is an integer number (21067755).

Almost surely, 2^82911749 is an apocalyptic number.

It is an amenable number.

82911749 is a deficient number, since it is larger than the sum of its proper divisors (1359271).

82911749 is a wasteful number, since it uses less digits than its factorization.

82911749 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1359270.

The product of its digits is 36288, while the sum is 41.

The square root of 82911749 is about 9105.5888881500. The cubic root of 82911749 is about 436.0524110746.

The spelling of 82911749 in words is "eighty-two million, nine hundred eleven thousand, seven hundred forty-nine".