13673021 has 2 divisors, whose sum is σ = 13673022. Its totient is φ = 13673020.

The previous prime is 13673003. The next prime is 13673041. The reversal of 13673021 is 12037631.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 12880921 + 792100 = 3589^2 + 890^2 .

It is an emirp because it is prime and its reverse (12037631) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 13673021 - 2²² = 9478717 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13673041) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6836510 + 6836511.

It is an arithmetic number, because the mean of its divisors is an integer number (6836511).

Almost surely, 2^13673021 is an apocalyptic number.

It is an amenable number.

13673021 is a deficient number, since it is larger than the sum of its proper divisors (1).

13673021 is an equidigital number, since it uses as much as digits as its factorization.

13673021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 756, while the sum is 23.

The square root of 13673021 is about 3697.7048286741. The cubic root of 13673021 is about 239.1230787087.

The spelling of 13673021 in words is "thirteen million, six hundred seventy-three thousand, twenty-one".