1375208872249 has 9 divisors (see below), whose sum is σ = 1377752446317. Its totient is φ = 1372669991904.

The previous prime is 1375208872241. The next prime is 1375208872253. The reversal of 1375208872249 is 9422788025731.

The square root of 1375208872249 is 1172693.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in 4 ways, for example, as 87737402025 + 1287471470224 = 296205^2 + 1134668^2 .

It is not a de Polignac number, because 1375208872249 - 2³ = 1375208872241 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1375208872193 and 1375208872202.

It is not an unprimeable number, because it can be changed into a prime (1375208872241) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 1253608269 + ... + 1253609365.

Almost surely, 2^{1375208872249} is an apocalyptic number.

1375208872249 is the 1172693-rd square number.

1375208872249 is the 586347-th centered octagonal number.

It is an amenable number.

1375208872249 is a deficient number, since it is larger than the sum of its proper divisors (2543574068).

1375208872249 is an frugal number, since it uses more digits than its factorization.

1375208872249 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4332 (or 2166 counting only the distinct ones).

The product of its (nonzero) digits is 13547520, while the sum is 58.

The spelling of 1375208872249 in words is "one trillion, three hundred seventy-five billion, two hundred eight million, eight hundred seventy-two thousand, two hundred forty-nine".