82109837 has 2 divisors, whose sum is σ = 82109838. Its totient is φ = 82109836.

The previous prime is 82109831. The next prime is 82109851. The reversal of 82109837 is 73890128.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 53743561 + 28366276 = 7331^2 + 5326^2 .

It is a cyclic number.

It is not a de Polignac number, because 82109837 - 2⁸ = 82109581 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 82109837.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (82109831) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 41054918 + 41054919.

It is an arithmetic number, because the mean of its divisors is an integer number (41054919).

Almost surely, 2^82109837 is an apocalyptic number.

It is an amenable number.

82109837 is a deficient number, since it is larger than the sum of its proper divisors (1).

82109837 is an equidigital number, since it uses as much as digits as its factorization.

82109837 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 24192, while the sum is 38.

The square root of 82109837 is about 9061.4478423704. The cubic root of 82109837 is about 434.6420395981.

The spelling of 82109837 in words is "eighty-two million, one hundred nine thousand, eight hundred thirty-seven".