7123939845 has 96 divisors (see below), whose sum is σ = 13766143104. Its totient is φ = 3108864000.

The previous prime is 7123939843. The next prime is 7123939847. The reversal of 7123939845 is 5489393217.

It is an interprime number because it is at equal distance from previous prime (7123939843) and next prime (7123939847).

It is not a de Polignac number, because 7123939845 - 2¹ = 7123939843 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (51).

Its product of digits (1632960) is a multiple of the sum of its prime divisors (4860).

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7123939843) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 1481445 + ... + 1486245.

It is an arithmetic number, because the mean of its divisors is an integer number (143397324).

Almost surely, 2^7123939845 is an apocalyptic number.

It is an amenable number.

7123939845 is a deficient number, since it is larger than the sum of its proper divisors (6642203259).

7123939845 is a wasteful number, since it uses less digits than its factorization.

7123939845 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4883 (or 4860 counting only the distinct ones).

The product of its digits is 1632960, while the sum is 51.

The square root of 7123939845 is about 84403.4350308090. The cubic root of 7123939845 is about 1924.1551221274.

The spelling of 7123939845 in words is "seven billion, one hundred twenty-three million, nine hundred thirty-nine thousand, eight hundred forty-five".