1394273891 has 4 divisors (see below), whose sum is σ = 1406612712. Its totient is φ = 1381935072.

The previous prime is 1394273843. The next prime is 1394273957. The reversal of 1394273891 is 1983724931.

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

It is a cyclic number.

It is not a de Polignac number, because 1394273891 - 2¹⁴ = 1394257507 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1394273821) 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 in 3 ways as a sum of consecutive naturals, for example, 6169241 + ... + 6169466.

It is an arithmetic number, because the mean of its divisors is an integer number (351653178).

Almost surely, 2^1394273891 is an apocalyptic number.

1394273891 is a deficient number, since it is larger than the sum of its proper divisors (12338821).

1394273891 is a wasteful number, since it uses less digits than its factorization.

1394273891 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12338820.

The product of its digits is 326592, while the sum is 47.

The square root of 1394273891 is about 37339.9771156866. The cubic root of 1394273891 is about 1117.1616830252.

The spelling of 1394273891 in words is "one billion, three hundred ninety-four million, two hundred seventy-three thousand, eight hundred ninety-one".