1942543439 has 4 divisors (see below), whose sum is σ = 1979195256. Its totient is φ = 1905891624.

The previous prime is 1942543409. The next prime is 1942543441. The reversal of 1942543439 is 9343452491.

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 1942543439 - 2¹² = 1942539343 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1942543439.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1942543409) 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, 18325829 + ... + 18325934.

It is an arithmetic number, because the mean of its divisors is an integer number (494798814).

Almost surely, 2^1942543439 is an apocalyptic number.

1942543439 is a deficient number, since it is larger than the sum of its proper divisors (36651817).

1942543439 is an equidigital number, since it uses as much as digits as its factorization.

1942543439 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36651816.

The product of its digits is 466560, while the sum is 44.

The square root of 1942543439 is about 44074.2945377461. The cubic root of 1942543439 is about 1247.7385113226.

The spelling of 1942543439 in words is "one billion, nine hundred forty-two million, five hundred forty-three thousand, four hundred thirty-nine".