7938370139 has 4 divisors (see below), whose sum is σ = 9072423024. Its totient is φ = 6804317256.

The previous prime is 7938370117. The next prime is 7938370147. The reversal of 7938370139 is 9310738397.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 9310738397 = 19 ⋅490038863.

It is a cyclic number.

It is not a de Polignac number, because 7938370139 - 2²⁰ = 7937321563 is a prime.

It is not an unprimeable number, because it can be changed into a prime (7938370159) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 567026432 + ... + 567026445.

It is an arithmetic number, because the mean of its divisors is an integer number (2268105756).

Almost surely, 2^7938370139 is an apocalyptic number.

7938370139 is a deficient number, since it is larger than the sum of its proper divisors (1134052885).

7938370139 is a wasteful number, since it uses less digits than its factorization.

7938370139 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1134052884.

The product of its (nonzero) digits is 857304, while the sum is 50.

The square root of 7938370139 is about 89097.5316100283. The cubic root of 7938370139 is about 1994.8509331818.

The spelling of 7938370139 in words is "seven billion, nine hundred thirty-eight million, three hundred seventy thousand, one hundred thirty-nine".