13530397 has 2 divisors, whose sum is σ = 13530398. Its totient is φ = 13530396.

The previous prime is 13530379. The next prime is 13530401. The reversal of 13530397 is 79303531.

Together with previous prime (13530379) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 11737476 + 1792921 = 3426^2 + 1339^2 .

It is a cyclic number.

It is not a de Polignac number, because 13530397 - 2¹¹ = 13528349 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13530347) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6765198 + 6765199.

It is an arithmetic number, because the mean of its divisors is an integer number (6765199).

Almost surely, 2^13530397 is an apocalyptic number.

It is an amenable number.

13530397 is a deficient number, since it is larger than the sum of its proper divisors (1).

13530397 is an equidigital number, since it uses as much as digits as its factorization.

13530397 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 8505, while the sum is 31.

The square root of 13530397 is about 3678.3687960834. The cubic root of 13530397 is about 238.2887357938.

The spelling of 13530397 in words is "thirteen million, five hundred thirty thousand, three hundred ninety-seven".