13531199939 has 2 divisors, whose sum is σ = 13531199940. Its totient is φ = 13531199938.

The previous prime is 13531199933. The next prime is 13531200019. The reversal of 13531199939 is 93999113531.

It is a happy number.

13531199939 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 13531199939 - 2¹⁶ = 13531134403 is a prime.

It is a super-4 number, since 4×13531199939⁴ (a number of 42 digits) contains 4444 as substring.

It is not a weakly prime, because it can be changed into another prime (13531199933) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6765599969 + 6765599970.

It is an arithmetic number, because the mean of its divisors is an integer number (6765599970).

Almost surely, 2^13531199939 is an apocalyptic number.

13531199939 is a deficient number, since it is larger than the sum of its proper divisors (1).

13531199939 is an equidigital number, since it uses as much as digits as its factorization.

13531199939 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 885735, while the sum is 53.

The spelling of 13531199939 in words is "thirteen billion, five hundred thirty-one million, one hundred ninety-nine thousand, nine hundred thirty-nine".