47139115 has 4 divisors (see below), whose sum is σ = 56566944. Its totient is φ = 37711288.

The previous prime is 47139109. The next prime is 47139119. The reversal of 47139115 is 51193174.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 47139115 - 2¹¹ = 47137067 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (47139119) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4713907 + ... + 4713916.

It is an arithmetic number, because the mean of its divisors is an integer number (14141736).

Almost surely, 2^47139115 is an apocalyptic number.

47139115 is a deficient number, since it is larger than the sum of its proper divisors (9427829).

47139115 is an equidigital number, since it uses as much as digits as its factorization.

47139115 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9427828.

The product of its digits is 3780, while the sum is 31.

The square root of 47139115 is about 6865.7931078645. The cubic root of 47139115 is about 361.2383153351.

The spelling of 47139115 in words is "forty-seven million, one hundred thirty-nine thousand, one hundred fifteen".