7842137943 has 16 divisors (see below), whose sum is σ = 10731159296. Its totient is φ = 5091327360.

The previous prime is 7842137939. The next prime is 7842137959. The reversal of 7842137943 is 3497312487.

It is not a de Polignac number, because 7842137943 - 2² = 7842137939 is a prime.

It is a super-2 number, since 2×7842137943² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 7842137892 and 7842137901.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7842137923) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 46723 + ... + 133668.

It is an arithmetic number, because the mean of its divisors is an integer number (670697456).

Almost surely, 2^7842137943 is an apocalyptic number.

7842137943 is a deficient number, since it is larger than the sum of its proper divisors (2889021353).

7842137943 is a wasteful number, since it uses less digits than its factorization.

7842137943 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 180774.

The product of its digits is 1016064, while the sum is 48.

The square root of 7842137943 is about 88555.8464642510. The cubic root of 7842137943 is about 1986.7573380641.

The spelling of 7842137943 in words is "seven billion, eight hundred forty-two million, one hundred thirty-seven thousand, nine hundred forty-three".