1377087617 has 4 divisors (see below), whose sum is σ = 1384222980. Its totient is φ = 1369952256.

The previous prime is 1377087583. The next prime is 1377087637. The reversal of 1377087617 is 7167807731.

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 469632241 + 907455376 = 21671^2 + 30124^2 .

It is a cyclic number.

It is not a de Polignac number, because 1377087617 - 2¹⁴ = 1377071233 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1377087637) 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, 3567392 + ... + 3567777.

It is an arithmetic number, because the mean of its divisors is an integer number (346055745).

Almost surely, 2^1377087617 is an apocalyptic number.

It is an amenable number.

1377087617 is a deficient number, since it is larger than the sum of its proper divisors (7135363).

1377087617 is an equidigital number, since it uses as much as digits as its factorization.

1377087617 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7135362.

The product of its (nonzero) digits is 345744, while the sum is 47.

The square root of 1377087617 is about 37109.1311808832. The cubic root of 1377087617 is about 1112.5525266114.

The spelling of 1377087617 in words is "one billion, three hundred seventy-seven million, eighty-seven thousand, six hundred seventeen".