13876921 has 2 divisors, whose sum is σ = 13876922. Its totient is φ = 13876920.

The previous prime is 13876883. The next prime is 13876931. The reversal of 13876921 is 12967831.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 13875625 + 1296 = 3725^2 + 36^2 .

It is an emirp because it is prime and its reverse (12967831) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 13876921 - 2¹⁵ = 13844153 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (13876931) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6938460 + 6938461.

It is an arithmetic number, because the mean of its divisors is an integer number (6938461).

Almost surely, 2^13876921 is an apocalyptic number.

It is an amenable number.

13876921 is a deficient number, since it is larger than the sum of its proper divisors (1).

13876921 is an equidigital number, since it uses as much as digits as its factorization.

13876921 is an evil number, because the sum of its binary digits is even.

The product of its digits is 18144, while the sum is 37.

The square root of 13876921 is about 3725.1739556697. The cubic root of 13876921 is about 240.3058658135.

The spelling of 13876921 in words is "thirteen million, eight hundred seventy-six thousand, nine hundred twenty-one".