47149539847 has 2 divisors, whose sum is σ = 47149539848. Its totient is φ = 47149539846.

The previous prime is 47149539809. The next prime is 47149539859. The reversal of 47149539847 is 74893594174.

47149539847 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 47149539847 - 2²⁷ = 47015322119 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (47149519847) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 23574769923 + 23574769924.

It is an arithmetic number, because the mean of its divisors is an integer number (23574769924).

Almost surely, 2^47149539847 is an apocalyptic number.

47149539847 is a deficient number, since it is larger than the sum of its proper divisors (1).

47149539847 is an equidigital number, since it uses as much as digits as its factorization.

47149539847 is an evil number, because the sum of its binary digits is even.

The product of its digits is 30481920, while the sum is 61.

The spelling of 47149539847 in words is "forty-seven billion, one hundred forty-nine million, five hundred thirty-nine thousand, eight hundred forty-seven".