13735921 has 2 divisors, whose sum is σ = 13735922. Its totient is φ = 13735920.

The previous prime is 13735913. The next prime is 13735933. The reversal of 13735921 is 12953731.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 8785296 + 4950625 = 2964^2 + 2225^2 .

It is a cyclic number.

It is not a de Polignac number, because 13735921 - 2³ = 13735913 is a prime.

It is not a weakly prime, because it can be changed into another prime (13735901) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6867960 + 6867961.

It is an arithmetic number, because the mean of its divisors is an integer number (6867961).

Almost surely, 2^13735921 is an apocalyptic number.

It is an amenable number.

13735921 is a deficient number, since it is larger than the sum of its proper divisors (1).

13735921 is an equidigital number, since it uses as much as digits as its factorization.

13735921 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5670, while the sum is 31.

The square root of 13735921 is about 3706.2003453672. The cubic root of 13735921 is about 239.4891971714.

The spelling of 13735921 in words is "thirteen million, seven hundred thirty-five thousand, nine hundred twenty-one".