7930742689 has 16 divisors (see below), whose sum is σ = 8214771600. Its totient is φ = 7650581760.

The previous prime is 7930742593. The next prime is 7930742693. The reversal of 7930742689 is 9862470397.

It can be written as a sum of positive squares in 8 ways, for example, as 2767601664 + 5163141025 = 52608^2 + 71855^2 .

It is not a de Polignac number, because 7930742689 - 2¹⁵ = 7930709921 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (7930742389) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4260619 + ... + 4262479.

It is an arithmetic number, because the mean of its divisors is an integer number (513423225).

Almost surely, 2^7930742689 is an apocalyptic number.

It is an amenable number.

7930742689 is a deficient number, since it is larger than the sum of its proper divisors (284028911).

7930742689 is a wasteful number, since it uses less digits than its factorization.

7930742689 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2820.

The product of its (nonzero) digits is 4572288, while the sum is 55.

The square root of 7930742689 is about 89054.7173876825. The cubic root of 7930742689 is about 1994.2118220749.

The spelling of 7930742689 in words is "seven billion, nine hundred thirty million, seven hundred forty-two thousand, six hundred eighty-nine".