13121827 has 2 divisors, whose sum is σ = 13121828. Its totient is φ = 13121826.

The previous prime is 13121813. The next prime is 13121839. The reversal of 13121827 is 72812131.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 13121827 - 2¹⁵ = 13089059 is a prime.

It is not a weakly prime, because it can be changed into another prime (13121887) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6560913 + 6560914.

It is an arithmetic number, because the mean of its divisors is an integer number (6560914).

Almost surely, 2^13121827 is an apocalyptic number.

13121827 is a deficient number, since it is larger than the sum of its proper divisors (1).

13121827 is an equidigital number, since it uses as much as digits as its factorization.

13121827 is an evil number, because the sum of its binary digits is even.

The product of its digits is 672, while the sum is 25.

The square root of 13121827 is about 3622.4062444734. The cubic root of 13121827 is about 235.8656889213.

Adding to 13121827 its reverse (72812131), we get a palindrome (85933958).

The spelling of 13121827 in words is "thirteen million, one hundred twenty-one thousand, eight hundred twenty-seven".