139056437249 has 4 divisors (see below), whose sum is σ = 139098566100. Its totient is φ = 139014308400.

The previous prime is 139056437243. The next prime is 139056437281. The reversal of 139056437249 is 942734650931.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 39164410000 + 99892027249 = 197900^2 + 316057^2 .

It is a cyclic number.

It is not a de Polignac number, because 139056437249 - 2³⁶ = 70336960513 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 139056437249.

It is not an unprimeable number, because it can be changed into a prime (139056437243) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 21059474 + ... + 21066075.

It is an arithmetic number, because the mean of its divisors is an integer number (34774641525).

Almost surely, 2^139056437249 is an apocalyptic number.

It is an amenable number.

139056437249 is a deficient number, since it is larger than the sum of its proper divisors (42128851).

139056437249 is an equidigital number, since it uses as much as digits as its factorization.

139056437249 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42128850.

The product of its (nonzero) digits is 4898880, while the sum is 53.

The spelling of 139056437249 in words is "one hundred thirty-nine billion, fifty-six million, four hundred thirty-seven thousand, two hundred forty-nine".