1393938164 has 6 divisors (see below), whose sum is σ = 2439391794. Its totient is φ = 696969080.

The previous prime is 1393938127. The next prime is 1393938187. The reversal of 1393938164 is 4618393931.

It can be written as a sum of positive squares in only one way, i.e., 878648164 + 515290000 = 29642^2 + 22700^2 .

It is a congruent number.

It is an unprimeable number.

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, 174242267 + ... + 174242274.

It is an arithmetic number, because the mean of its divisors is an integer number (406565299).

Almost surely, 2^1393938164 is an apocalyptic number.

It is an amenable number.

1393938164 is a deficient number, since it is larger than the sum of its proper divisors (1045453630).

1393938164 is a wasteful number, since it uses less digits than its factorization.

1393938164 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 348484545 (or 348484543 counting only the distinct ones).

The product of its digits is 419904, while the sum is 47.

The square root of 1393938164 is about 37335.4813013037. The cubic root of 1393938164 is about 1117.0720087628.

The spelling of 1393938164 in words is "one billion, three hundred ninety-three million, nine hundred thirty-eight thousand, one hundred sixty-four".