47139547 has 8 divisors (see below), whose sum is σ = 58018016. Its totient is φ = 37297152.

The previous prime is 47139541. The next prime is 47139553. The reversal of 47139547 is 74593174.

It is an interprime number because it is at equal distance from previous prime (47139541) and next prime (47139553).

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-47139547 is a prime.

It is not an unprimeable number, because it can be changed into a prime (47139541) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 258918 + ... + 259099.

It is an arithmetic number, because the mean of its divisors is an integer number (7252252).

Almost surely, 2^47139547 is an apocalyptic number.

47139547 is a deficient number, since it is larger than the sum of its proper divisors (10878469).

47139547 is a wasteful number, since it uses less digits than its factorization.

47139547 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 518037.

The product of its digits is 105840, while the sum is 40.

The square root of 47139547 is about 6865.8245681054. The cubic root of 47139547 is about 361.2394188382.

The spelling of 47139547 in words is "forty-seven million, one hundred thirty-nine thousand, five hundred forty-seven".