13730819 has 2 divisors, whose sum is σ = 13730820. Its totient is φ = 13730818.

The previous prime is 13730809. The next prime is 13730851. The reversal of 13730819 is 91803731.

It is an a-pointer prime, because the next prime (13730851) can be obtained adding 13730819 to its sum of digits (32).

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 13730819 - 2¹² = 13726723 is a prime.

It is a super-2 number, since 2×13730819² = 377070780821522, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (13730809) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6865409 + 6865410.

It is an arithmetic number, because the mean of its divisors is an integer number (6865410).

Almost surely, 2^13730819 is an apocalyptic number.

13730819 is a deficient number, since it is larger than the sum of its proper divisors (1).

13730819 is an equidigital number, since it uses as much as digits as its factorization.

13730819 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4536, while the sum is 32.

The square root of 13730819 is about 3705.5119754226. The cubic root of 13730819 is about 239.4595419533.

The spelling of 13730819 in words is "thirteen million, seven hundred thirty thousand, eight hundred nineteen".