7942873457 has 4 divisors (see below), whose sum is σ = 7943633316. Its totient is φ = 7942113600.

The previous prime is 7942873453. The next prime is 7942873483. The reversal of 7942873457 is 7543782497.

It is a happy number.

7942873457 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 7543782497 = 20161 ⋅374177.

It can be written as a sum of positive squares in 2 ways, for example, as 5266259761 + 2676613696 = 72569^2 + 51736^2 .

It is a cyclic number.

It is not a de Polignac number, because 7942873457 - 2² = 7942873453 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (7942873451) 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, 364028 + ... + 385229.

It is an arithmetic number, because the mean of its divisors is an integer number (1985908329).

Almost surely, 2^7942873457 is an apocalyptic number.

It is an amenable number.

7942873457 is a deficient number, since it is larger than the sum of its proper divisors (759859).

7942873457 is a wasteful number, since it uses less digits than its factorization.

7942873457 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 759858.

The product of its digits is 11854080, while the sum is 56.

The square root of 7942873457 is about 89122.7998718622. The cubic root of 7942873457 is about 1995.2280781863.

The spelling of 7942873457 in words is "seven billion, nine hundred forty-two million, eight hundred seventy-three thousand, four hundred fifty-seven".