1377105517 has 4 divisors (see below), whose sum is σ = 1379428380. Its totient is φ = 1374782656.

The previous prime is 1377105511. The next prime is 1377105599. The reversal of 1377105517 is 7155017731.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 7155017731 = 21401 ⋅334331.

It can be written as a sum of positive squares in 2 ways, for example, as 455011561 + 922093956 = 21331^2 + 30366^2 .

It is a cyclic number.

It is not a de Polignac number, because 1377105517 - 2¹⁹ = 1376581229 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 (1377105511) 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, 1160542 + ... + 1161727.

It is an arithmetic number, because the mean of its divisors is an integer number (344857095).

Almost surely, 2^1377105517 is an apocalyptic number.

It is an amenable number.

1377105517 is a deficient number, since it is larger than the sum of its proper divisors (2322863).

1377105517 is an equidigital number, since it uses as much as digits as its factorization.

1377105517 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2322862.

The product of its (nonzero) digits is 25725, while the sum is 37.

The square root of 1377105517 is about 37109.3723606315. The cubic root of 1377105517 is about 1112.5573470754.

The spelling of 1377105517 in words is "one billion, three hundred seventy-seven million, one hundred five thousand, five hundred seventeen".