7930159813 has 4 divisors (see below), whose sum is σ = 8396639820. Its totient is φ = 7463679808.

The previous prime is 7930159807. The next prime is 7930159841. The reversal of 7930159813 is 3189510397.

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: 3189510397 = 229 ⋅13927993.

It can be written as a sum of positive squares in 2 ways, for example, as 2366044164 + 5564115649 = 48642^2 + 74593^2 .

It is a cyclic number.

It is not a de Polignac number, because 7930159813 - 2²¹ = 7928062661 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 (7930159843) 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, 233239978 + ... + 233240011.

It is an arithmetic number, because the mean of its divisors is an integer number (2099159955).

Almost surely, 2^7930159813 is an apocalyptic number.

It is an amenable number.

7930159813 is a deficient number, since it is larger than the sum of its proper divisors (466480007).

7930159813 is a wasteful number, since it uses less digits than its factorization.

7930159813 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 466480006.

The product of its (nonzero) digits is 204120, while the sum is 46.

The square root of 7930159813 is about 89051.4447552649. Note that the first 3 decimals coincide. The cubic root of 7930159813 is about 1994.1629655036.

The spelling of 7930159813 in words is "seven billion, nine hundred thirty million, one hundred fifty-nine thousand, eight hundred thirteen".