83828749 has 4 divisors (see below), whose sum is σ = 84015900. Its totient is φ = 83641600.

The previous prime is 83828699. The next prime is 83828761. The reversal of 83828749 is 94782838.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 94782838 = 2 ⋅47391419.

It can be written as a sum of positive squares in 2 ways, for example, as 16752649 + 67076100 = 4093^2 + 8190^2 .

It is a cyclic number.

It is not a de Polignac number, because 83828749 - 2⁷ = 83828621 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 (83828249) 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 3 ways as a sum of consecutive naturals, for example, 92902 + ... + 93799.

It is an arithmetic number, because the mean of its divisors is an integer number (21003975).

Almost surely, 2^83828749 is an apocalyptic number.

It is an amenable number.

83828749 is a deficient number, since it is larger than the sum of its proper divisors (187151).

83828749 is a wasteful number, since it uses less digits than its factorization.

83828749 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 187150.

The product of its digits is 774144, while the sum is 49.

The square root of 83828749 is about 9155.8041154232. The cubic root of 83828749 is about 437.6540936381.

The spelling of 83828749 in words is "eighty-three million, eight hundred twenty-eight thousand, seven hundred forty-nine".