1377115643 has 4 divisors (see below), whose sum is σ = 1387167720. Its totient is φ = 1367063568.

The previous prime is 1377115633. The next prime is 1377115657. The reversal of 1377115643 is 3465117731.

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

It is a cyclic number.

It is not a de Polignac number, because 1377115643 - 2¹⁶ = 1377050107 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1377115597 and 1377115606.

It is not an unprimeable number, because it can be changed into a prime (1377115613) 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 in 3 ways as a sum of consecutive naturals, for example, 5025833 + ... + 5026106.

It is an arithmetic number, because the mean of its divisors is an integer number (346791930).

Almost surely, 2^1377115643 is an apocalyptic number.

1377115643 is a deficient number, since it is larger than the sum of its proper divisors (10052077).

1377115643 is a wasteful number, since it uses less digits than its factorization.

1377115643 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10052076.

The product of its digits is 52920, while the sum is 38.

The square root of 1377115643 is about 37109.5087949167. The cubic root of 1377115643 is about 1112.5600739853.

The spelling of 1377115643 in words is "one billion, three hundred seventy-seven million, one hundred fifteen thousand, six hundred forty-three".