13765819 has 2 divisors, whose sum is σ = 13765820. Its totient is φ = 13765818.

The previous prime is 13765811. The next prime is 13765841. The reversal of 13765819 is 91856731.

13765819 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is an emirp because it is prime and its reverse (91856731) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 13765819 - 2³ = 13765811 is a prime.

It is a super-2 number, since 2×13765819² = 378995545481522, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (13765811) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6882909 + 6882910.

It is an arithmetic number, because the mean of its divisors is an integer number (6882910).

Almost surely, 2^13765819 is an apocalyptic number.

13765819 is a deficient number, since it is larger than the sum of its proper divisors (1).

13765819 is an equidigital number, since it uses as much as digits as its factorization.

13765819 is an evil number, because the sum of its binary digits is even.

The product of its digits is 45360, while the sum is 40.

The square root of 13765819 is about 3710.2316639261. The cubic root of 13765819 is about 239.6628309409.

It can be divided in two parts, 137 and 65819, that added together give a palindrome (65956).

The spelling of 13765819 in words is "thirteen million, seven hundred sixty-five thousand, eight hundred nineteen".