82137823 has 2 divisors, whose sum is σ = 82137824. Its totient is φ = 82137822.

The previous prime is 82137821. The next prime is 82137851. The reversal of 82137823 is 32873128.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 82137823 - 2¹ = 82137821 is a prime.

Together with 82137821, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (82137821) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 41068911 + 41068912.

It is an arithmetic number, because the mean of its divisors is an integer number (41068912).

Almost surely, 2^82137823 is an apocalyptic number.

82137823 is a deficient number, since it is larger than the sum of its proper divisors (1).

82137823 is an equidigital number, since it uses as much as digits as its factorization.

82137823 is an evil number, because the sum of its binary digits is even.

The product of its digits is 16128, while the sum is 34.

The square root of 82137823 is about 9062.9919452684. The cubic root of 82137823 is about 434.6914145608.

The spelling of 82137823 in words is "eighty-two million, one hundred thirty-seven thousand, eight hundred twenty-three".