7943939901 has 12 divisors (see below), whose sum is σ = 11477873628. Its totient is φ = 5294439744.

The previous prime is 7943939833. The next prime is 7943939921. The reversal of 7943939901 is 1099393497.

It can be written as a sum of positive squares in 2 ways, for example, as 3678543801 + 4265396100 = 60651^2 + 65310^2 .

It is not a de Polignac number, because 7943939901 - 2²¹ = 7941842749 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7943939921) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 93120 + ... + 156713.

It is an arithmetic number, because the mean of its divisors is an integer number (956489469).

Almost surely, 2^7943939901 is an apocalyptic number.

It is an amenable number.

7943939901 is a deficient number, since it is larger than the sum of its proper divisors (3533933727).

7943939901 is a wasteful number, since it uses less digits than its factorization.

7943939901 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 253372 (or 253369 counting only the distinct ones).

The product of its (nonzero) digits is 1653372, while the sum is 54.

The square root of 7943939901 is about 89128.7826742854. The cubic root of 7943939901 is about 1995.3173701284.

The spelling of 7943939901 in words is "seven billion, nine hundred forty-three million, nine hundred thirty-nine thousand, nine hundred one".