12693524509 has 2 divisors, whose sum is σ = 12693524510. Its totient is φ = 12693524508.

The previous prime is 12693524447. The next prime is 12693524531. The reversal of 12693524509 is 90542539621.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 12528324900 + 165199609 = 111930^2 + 12853^2 .

It is an emirp because it is prime and its reverse (90542539621) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 12693524509 - 2⁷ = 12693524381 is a prime.

It is a super-2 number, since 2×12693524509² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12693524549) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6346762254 + 6346762255.

It is an arithmetic number, because the mean of its divisors is an integer number (6346762255).

Almost surely, 2^12693524509 is an apocalyptic number.

It is an amenable number.

12693524509 is a deficient number, since it is larger than the sum of its proper divisors (1).

12693524509 is an equidigital number, since it uses as much as digits as its factorization.

12693524509 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 583200, while the sum is 46.

The spelling of 12693524509 in words is "twelve billion, six hundred ninety-three million, five hundred twenty-four thousand, five hundred nine".