13878229 has 2 divisors, whose sum is σ = 13878230. Its totient is φ = 13878228.

The previous prime is 13878217. The next prime is 13878281. The reversal of 13878229 is 92287831.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 7851204 + 6027025 = 2802^2 + 2455^2 .

It is a cyclic number.

It is not a de Polignac number, because 13878229 - 2⁵ = 13878197 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 13878191 and 13878200.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13878929) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6939114 + 6939115.

It is an arithmetic number, because the mean of its divisors is an integer number (6939115).

Almost surely, 2^13878229 is an apocalyptic number.

It is an amenable number.

13878229 is a deficient number, since it is larger than the sum of its proper divisors (1).

13878229 is an equidigital number, since it uses as much as digits as its factorization.

13878229 is an evil number, because the sum of its binary digits is even.

The product of its digits is 48384, while the sum is 40.

The square root of 13878229 is about 3725.3495138040. The cubic root of 13878229 is about 240.3134157640.

It can be divided in two parts, 1387822 and 9, that added together give a palindrome (1387831).

The spelling of 13878229 in words is "thirteen million, eight hundred seventy-eight thousand, two hundred twenty-nine".