1377370745 has 4 divisors (see below), whose sum is σ = 1652844900. Its totient is φ = 1101896592.

The previous prime is 1377370733. The next prime is 1377370763. The reversal of 1377370745 is 5470737731.

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 1009459984 + 367910761 = 31772^2 + 19181^2 .

It is a cyclic number.

It is not a de Polignac number, because 1377370745 - 2⁶ = 1377370681 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1377370696 and 1377370705.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 137737070 + ... + 137737079.

It is an arithmetic number, because the mean of its divisors is an integer number (413211225).

Almost surely, 2^1377370745 is an apocalyptic number.

It is an amenable number.

1377370745 is a deficient number, since it is larger than the sum of its proper divisors (275474155).

1377370745 is an equidigital number, since it uses as much as digits as its factorization.

1377370745 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 275474154.

The product of its (nonzero) digits is 432180, while the sum is 44.

The square root of 1377370745 is about 37112.9457871509. The cubic root of 1377370745 is about 1112.6287679928.

The spelling of 1377370745 in words is "one billion, three hundred seventy-seven million, three hundred seventy thousand, seven hundred forty-five".