83684749 has 8 divisors (see below), whose sum is σ = 87339960. Its totient is φ = 80080896.

The previous prime is 83684743. The next prime is 83684767. The reversal of 83684749 is 94748638.

It can be written as a sum of positive squares in 4 ways, for example, as 11009124 + 72675625 = 3318^2 + 8525^2 .

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 83684749 - 2¹³ = 83676557 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (83684743) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9492 + ... + 16045.

It is an arithmetic number, because the mean of its divisors is an integer number (10917495).

Almost surely, 2^83684749 is an apocalyptic number.

It is an amenable number.

83684749 is a deficient number, since it is larger than the sum of its proper divisors (3655211).

83684749 is a wasteful number, since it uses less digits than its factorization.

83684749 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25679.

The product of its digits is 1161216, while the sum is 49.

The square root of 83684749 is about 9147.9368712295. The cubic root of 83684749 is about 437.4033510588.

The spelling of 83684749 in words is "eighty-three million, six hundred eighty-four thousand, seven hundred forty-nine".