1395972943 has 4 divisors (see below), whose sum is σ = 1396157400. Its totient is φ = 1395788488.

The previous prime is 1395972937. The next prime is 1395972953. The reversal of 1395972943 is 3492795931.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3492795931 = 29 ⋅120441239.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1395972943 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1395972953) 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, 80368 + ... + 96181.

It is an arithmetic number, because the mean of its divisors is an integer number (349039350).

Almost surely, 2^1395972943 is an apocalyptic number.

1395972943 is a deficient number, since it is larger than the sum of its proper divisors (184457).

1395972943 is an equidigital number, since it uses as much as digits as its factorization.

1395972943 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 184456.

The product of its digits is 1837080, while the sum is 52.

The square root of 1395972943 is about 37362.7213007832. The cubic root of 1395972943 is about 1117.6152871832.

The spelling of 1395972943 in words is "one billion, three hundred ninety-five million, nine hundred seventy-two thousand, nine hundred forty-three".