13537440197 has 2 divisors, whose sum is σ = 13537440198. Its totient is φ = 13537440196.

The previous prime is 13537440193. The next prime is 13537440247. The reversal of 13537440197 is 79104473531.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 12059114596 + 1478325601 = 109814^2 + 38449^2 .

It is a cyclic number.

It is not a de Polignac number, because 13537440197 - 2² = 13537440193 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13537440193) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6768720098 + 6768720099.

It is an arithmetic number, because the mean of its divisors is an integer number (6768720099).

Almost surely, 2^13537440197 is an apocalyptic number.

It is an amenable number.

13537440197 is a deficient number, since it is larger than the sum of its proper divisors (1).

13537440197 is an equidigital number, since it uses as much as digits as its factorization.

13537440197 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 317520, while the sum is 44.

It can be divided in two parts, 135374 and 40197, that added together give a palindrome (175571).

The spelling of 13537440197 in words is "thirteen billion, five hundred thirty-seven million, four hundred forty thousand, one hundred ninety-seven".