8938391047 has 2 divisors, whose sum is σ = 8938391048. Its totient is φ = 8938391046.

The previous prime is 8938391029. The next prime is 8938391081. The reversal of 8938391047 is 7401938398.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 8938391047 - 2²⁷ = 8804173319 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 8938390985 and 8938391003.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (8938391447) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4469195523 + 4469195524.

It is an arithmetic number, because the mean of its divisors is an integer number (4469195524).

Almost surely, 2^8938391047 is an apocalyptic number.

8938391047 is a deficient number, since it is larger than the sum of its proper divisors (1).

8938391047 is an equidigital number, since it uses as much as digits as its factorization.

8938391047 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1306368, while the sum is 52.

The square root of 8938391047 is about 94543.0645103066. The cubic root of 8938391047 is about 2075.3265889005.

The spelling of 8938391047 in words is "eight billion, nine hundred thirty-eight million, three hundred ninety-one thousand, forty-seven".