12139732469 has 2 divisors, whose sum is σ = 12139732470. Its totient is φ = 12139732468.

The previous prime is 12139732399. The next prime is 12139732477. The reversal of 12139732469 is 96423793121.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 11900628100 + 239104369 = 109090^2 + 15463^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12139732469 is a prime.

It is a super-2 number, since 2×12139732469² (a number of 21 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12139731469) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6069866234 + 6069866235.

It is an arithmetic number, because the mean of its divisors is an integer number (6069866235).

Almost surely, 2^12139732469 is an apocalyptic number.

It is an amenable number.

12139732469 is a deficient number, since it is larger than the sum of its proper divisors (1).

12139732469 is an equidigital number, since it uses as much as digits as its factorization.

12139732469 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 489888, while the sum is 47.

The spelling of 12139732469 in words is "twelve billion, one hundred thirty-nine million, seven hundred thirty-two thousand, four hundred sixty-nine".