47847439 has 2 divisors, whose sum is σ = 47847440. Its totient is φ = 47847438.

The previous prime is 47847431. The next prime is 47847461. The reversal of 47847439 is 93474874.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 47847439 - 2³ = 47847431 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (47847431) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 23923719 + 23923720.

It is an arithmetic number, because the mean of its divisors is an integer number (23923720).

Almost surely, 2^47847439 is an apocalyptic number.

47847439 is a deficient number, since it is larger than the sum of its proper divisors (1).

47847439 is an equidigital number, since it uses as much as digits as its factorization.

47847439 is an evil number, because the sum of its binary digits is even.

The product of its digits is 677376, while the sum is 46.

The square root of 47847439 is about 6917.1843260101. The cubic root of 47847439 is about 363.0386797367.

The spelling of 47847439 in words is "forty-seven million, eight hundred forty-seven thousand, four hundred thirty-nine".