13169021 has 2 divisors, whose sum is σ = 13169022. Its totient is φ = 13169020.

The previous prime is 13168943. The next prime is 13169027. The reversal of 13169021 is 12096131.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 10329796 + 2839225 = 3214^2 + 1685^2 .

It is an emirp because it is prime and its reverse (12096131) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-13169021 is a prime.

It is a super-2 number, since 2×13169021² = 346846228196882, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13169027) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6584510 + 6584511.

It is an arithmetic number, because the mean of its divisors is an integer number (6584511).

Almost surely, 2^13169021 is an apocalyptic number.

It is an amenable number.

13169021 is a deficient number, since it is larger than the sum of its proper divisors (1).

13169021 is an equidigital number, since it uses as much as digits as its factorization.

13169021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 324, while the sum is 23.

The square root of 13169021 is about 3628.9145760131. The cubic root of 13169021 is about 236.1481223252.

The spelling of 13169021 in words is "thirteen million, one hundred sixty-nine thousand, twenty-one".