83807749 has 2 divisors, whose sum is σ = 83807750. Its totient is φ = 83807748.

The previous prime is 83807747. The next prime is 83807771. The reversal of 83807749 is 94770838.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 43890625 + 39917124 = 6625^2 + 6318^2 .

It is a cyclic number.

It is not a de Polignac number, because 83807749 - 2¹ = 83807747 is a prime.

Together with 83807747, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 83807699 and 83807708.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (83807743) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 41903874 + 41903875.

It is an arithmetic number, because the mean of its divisors is an integer number (41903875).

Almost surely, 2^83807749 is an apocalyptic number.

It is an amenable number.

83807749 is a deficient number, since it is larger than the sum of its proper divisors (1).

83807749 is an equidigital number, since it uses as much as digits as its factorization.

83807749 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 338688, while the sum is 46.

The square root of 83807749 is about 9154.6572300660. The cubic root of 83807749 is about 437.6175449057.

It can be divided in two parts, 8380 and 7749, that added together give a square (16129 = 127²).

The spelling of 83807749 in words is "eighty-three million, eight hundred seven thousand, seven hundred forty-nine".