1395556943 has 4 divisors (see below), whose sum is σ = 1522425768. Its totient is φ = 1268688120.

The previous prime is 1395556933. The next prime is 1395556957. The reversal of 1395556943 is 3496555931.

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 1395556943 - 2⁴ = 1395556927 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1395556891 and 1395556900.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1395556933) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 63434396 + ... + 63434417.

It is an arithmetic number, because the mean of its divisors is an integer number (380606442).

Almost surely, 2^1395556943 is an apocalyptic number.

1395556943 is a deficient number, since it is larger than the sum of its proper divisors (126868825).

1395556943 is a wasteful number, since it uses less digits than its factorization.

1395556943 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 126868824.

The product of its digits is 2187000, while the sum is 50.

The square root of 1395556943 is about 37357.1538396597. The cubic root of 1395556943 is about 1117.5042596851.

The spelling of 1395556943 in words is "one billion, three hundred ninety-five million, five hundred fifty-six thousand, nine hundred forty-three".