13739897 has 2 divisors, whose sum is σ = 13739898. Its totient is φ = 13739896.

The previous prime is 13739821. The next prime is 13739923. The reversal of 13739897 is 79893731.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 12538681 + 1201216 = 3541^2 + 1096^2 .

It is an emirp because it is prime and its reverse (79893731) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 13739897 - 2¹⁴ = 13723513 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (13739497) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6869948 + 6869949.

It is an arithmetic number, because the mean of its divisors is an integer number (6869949).

Almost surely, 2^13739897 is an apocalyptic number.

It is an amenable number.

13739897 is a deficient number, since it is larger than the sum of its proper divisors (1).

13739897 is an equidigital number, since it uses as much as digits as its factorization.

13739897 is an evil number, because the sum of its binary digits is even.

The product of its digits is 285768, while the sum is 47.

The square root of 13739897 is about 3706.7367049738. The cubic root of 13739897 is about 239.5123024583.

The spelling of 13739897 in words is "thirteen million, seven hundred thirty-nine thousand, eight hundred ninety-seven".