7938136799 has 8 divisors (see below), whose sum is σ = 8196761088. Its totient is φ = 7679672280.

The previous prime is 7938136783. The next prime is 7938136823. The reversal of 7938136799 is 9976318397.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 7938136799 - 2⁴ = 7938136783 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7938138799) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 65504 + ... + 142010.

It is an arithmetic number, because the mean of its divisors is an integer number (1024595136).

Almost surely, 2^7938136799 is an apocalyptic number.

7938136799 is a deficient number, since it is larger than the sum of its proper divisors (258624289).

7938136799 is a wasteful number, since it uses less digits than its factorization.

7938136799 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 79885.

The product of its digits is 15431472, while the sum is 62.

The square root of 7938136799 is about 89096.2221365193. Note that the first 3 decimals coincide. The cubic root of 7938136799 is about 1994.8313874787.

The spelling of 7938136799 in words is "seven billion, nine hundred thirty-eight million, one hundred thirty-six thousand, seven hundred ninety-nine".