83981837 has 2 divisors, whose sum is σ = 83981838. Its totient is φ = 83981836.

The previous prime is 83981813. The next prime is 83981861. The reversal of 83981837 is 73818938.

It is a balanced prime because it is at equal distance from previous prime (83981813) and next prime (83981861).

It can be written as a sum of positive squares in only one way, i.e., 50965321 + 33016516 = 7139^2 + 5746^2 .

It is a cyclic number.

It is not a de Polignac number, because 83981837 - 2²⁰ = 82933261 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 83981791 and 83981800.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (83980837) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 41990918 + 41990919.

It is an arithmetic number, because the mean of its divisors is an integer number (41990919).

Almost surely, 2^83981837 is an apocalyptic number.

It is an amenable number.

83981837 is a deficient number, since it is larger than the sum of its proper divisors (1).

83981837 is an equidigital number, since it uses as much as digits as its factorization.

83981837 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 290304, while the sum is 47.

The square root of 83981837 is about 9164.1604634576. The cubic root of 83981837 is about 437.9203461554.

The spelling of 83981837 in words is "eighty-three million, nine hundred eighty-one thousand, eight hundred thirty-seven".