1375321187 has 4 divisors (see below), whose sum is σ = 1375486560. Its totient is φ = 1375155816.

The previous prime is 1375321177. The next prime is 1375321223. The reversal of 1375321187 is 7811235731.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 7811235731 = 13 ⋅600864287.

It is a cyclic number.

It is not a de Polignac number, because 1375321187 - 2¹⁸ = 1375059043 is a prime.

It is a super-2 number, since 2×1375321187² = 3783016734822177938, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1375321187.

It is not an unprimeable number, because it can be changed into a prime (1375321177) 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, 69512 + ... + 87077.

It is an arithmetic number, because the mean of its divisors is an integer number (343871640).

Almost surely, 2^1375321187 is an apocalyptic number.

1375321187 is a deficient number, since it is larger than the sum of its proper divisors (165373).

1375321187 is an equidigital number, since it uses as much as digits as its factorization.

1375321187 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 165372.

The product of its digits is 35280, while the sum is 38.

The square root of 1375321187 is about 37085.3230672189. The cubic root of 1375321187 is about 1112.0766219976.

The spelling of 1375321187 in words is "one billion, three hundred seventy-five million, three hundred twenty-one thousand, one hundred eighty-seven".