1439123987137 has 4 divisors (see below), whose sum is σ = 1439892341380. Its totient is φ = 1438355632896.

The previous prime is 1439123987099. The next prime is 1439123987153. The reversal of 1439123987137 is 7317893219341.

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 59711320881 + 1379412666256 = 244359^2 + 1174484^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1439123987137 is a prime.

It is a super-2 number, since 2×1439123987137² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1439123987737) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 384174312 + ... + 384178057.

It is an arithmetic number, because the mean of its divisors is an integer number (359973085345).

Almost surely, 2^{1439123987137} is an apocalyptic number.

It is an amenable number.

1439123987137 is a deficient number, since it is larger than the sum of its proper divisors (768354243).

1439123987137 is an equidigital number, since it uses as much as digits as its factorization.

1439123987137 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 768354242.

The product of its digits is 6858432, while the sum is 58.

The spelling of 1439123987137 in words is "one trillion, four hundred thirty-nine billion, one hundred twenty-three million, nine hundred eighty-seven thousand, one hundred thirty-seven".