1399642287437 has 12 divisors (see below), whose sum is σ = 1534838917716. Its totient is φ = 1271885879040.

The previous prime is 1399642287419. The next prime is 1399642287467. The reversal of 1399642287437 is 7347822469931.

It can be written as a sum of positive squares in 6 ways, for example, as 247656517801 + 1151985769636 = 497651^2 + 1073306^2 .

It is a de Polignac number, because none of the positive numbers 2^k-1399642287437 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1399642287467) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 48934514 + ... + 48963107.

It is an arithmetic number, because the mean of its divisors is an integer number (127903243143).

Almost surely, 2^{1399642287437} is an apocalyptic number.

1399642287437 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

It is an amenable number.

1399642287437 is a deficient number, since it is larger than the sum of its proper divisors (135196630279).

1399642287437 is an equidigital number, since it uses as much as digits as its factorization.

1399642287437 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 97897696 (or 97897667 counting only the distinct ones).

The product of its digits is 109734912, while the sum is 65.

The spelling of 1399642287437 in words is "one trillion, three hundred ninety-nine billion, six hundred forty-two million, two hundred eighty-seven thousand, four hundred thirty-seven".