1381227194 has 4 divisors (see below), whose sum is σ = 2071840794. Its totient is φ = 690613596.

The previous prime is 1381227193. The next prime is 1381227259. The reversal of 1381227194 is 4917221831.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 718936969 + 662290225 = 26813^2 + 25735^2 .

It is a super-2 number, since 2×1381227194² = 3815577122890227272, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1381227193) 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, 345306797 + ... + 345306800.

Almost surely, 2^1381227194 is an apocalyptic number.

1381227194 is a deficient number, since it is larger than the sum of its proper divisors (690613600).

1381227194 is an equidigital number, since it uses as much as digits as its factorization.

1381227194 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 690613599.

The product of its digits is 24192, while the sum is 38.

The square root of 1381227194 is about 37164.8650475150. The cubic root of 1381227194 is about 1113.6662029719. Note that the first 3 decimals are identical.

The spelling of 1381227194 in words is "one billion, three hundred eighty-one million, two hundred twenty-seven thousand, one hundred ninety-four".