1394442771 has 4 divisors (see below), whose sum is σ = 1859257032. Its totient is φ = 929628512.

The previous prime is 1394442761. The next prime is 1394442779. The reversal of 1394442771 is 1772444931.

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 1394442771 - 2⁵ = 1394442739 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1394442779) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 232407126 + ... + 232407131.

It is an arithmetic number, because the mean of its divisors is an integer number (464814258).

Almost surely, 2^1394442771 is an apocalyptic number.

1394442771 is a deficient number, since it is larger than the sum of its proper divisors (464814261).

1394442771 is an equidigital number, since it uses as much as digits as its factorization.

1394442771 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 464814260.

The product of its digits is 169344, while the sum is 42.

The square root of 1394442771 is about 37342.2384304958. The cubic root of 1394442771 is about 1117.2067862265.

The spelling of 1394442771 in words is "one billion, three hundred ninety-four million, four hundred forty-two thousand, seven hundred seventy-one".