1373421187 has 2 divisors, whose sum is σ = 1373421188. Its totient is φ = 1373421186.

The previous prime is 1373421067. The next prime is 1373421209. The reversal of 1373421187 is 7811243731.

It is a happy number.

It is a strong prime.

It is an emirp because it is prime and its reverse (7811243731) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1373421187 - 2¹¹ = 1373419139 is a prime.

It is not a weakly prime, because it can be changed into another prime (1373421487) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 686710593 + 686710594.

It is an arithmetic number, because the mean of its divisors is an integer number (686710594).

Almost surely, 2^1373421187 is an apocalyptic number.

1373421187 is a deficient number, since it is larger than the sum of its proper divisors (1).

1373421187 is an equidigital number, since it uses as much as digits as its factorization.

1373421187 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 28224, while the sum is 37.

The square root of 1373421187 is about 37059.6976107469. The cubic root of 1373421187 is about 1111.5642763827.

The spelling of 1373421187 in words is "one billion, three hundred seventy-three million, four hundred twenty-one thousand, one hundred eighty-seven".