13247770537 has 2 divisors, whose sum is σ = 13247770538. Its totient is φ = 13247770536.

The previous prime is 13247770451. The next prime is 13247770553. The reversal of 13247770537 is 73507774231.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 8238103696 + 5009666841 = 90764^2 + 70779^2 .

It is an emirp because it is prime and its reverse (73507774231) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 13247770537 - 2⁷ = 13247770409 is a prime.

It is not a weakly prime, because it can be changed into another prime (13247776537) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6623885268 + 6623885269.

It is an arithmetic number, because the mean of its divisors is an integer number (6623885269).

Almost surely, 2^13247770537 is an apocalyptic number.

It is an amenable number.

13247770537 is a deficient number, since it is larger than the sum of its proper divisors (1).

13247770537 is an equidigital number, since it uses as much as digits as its factorization.

13247770537 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 864360, while the sum is 46.

The spelling of 13247770537 in words is "thirteen billion, two hundred forty-seven million, seven hundred seventy thousand, five hundred thirty-seven".