47521139 has 2 divisors, whose sum is σ = 47521140. Its totient is φ = 47521138.

The previous prime is 47521121. The next prime is 47521211. The reversal of 47521139 is 93112574.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 47521139 - 2²⁰ = 46472563 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (47541139) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 23760569 + 23760570.

It is an arithmetic number, because the mean of its divisors is an integer number (23760570).

Almost surely, 2^47521139 is an apocalyptic number.

47521139 is a deficient number, since it is larger than the sum of its proper divisors (1).

47521139 is an equidigital number, since it uses as much as digits as its factorization.

47521139 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 7560, while the sum is 32.

The square root of 47521139 is about 6893.5577897048. The cubic root of 47521139 is about 362.2115380936.

The spelling of 47521139 in words is "forty-seven million, five hundred twenty-one thousand, one hundred thirty-nine".