47391747 has 8 divisors (see below), whose sum is σ = 68049744. Its totient is φ = 29164128.

The previous prime is 47391731. The next prime is 47391749. The reversal of 47391747 is 74719374.

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

It is not a de Polignac number, because 47391747 - 2⁴ = 47391731 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 47391699 and 47391708.

It is not an unprimeable number, because it can be changed into a prime (47391749) 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, 607548 + ... + 607625.

It is an arithmetic number, because the mean of its divisors is an integer number (8506218).

Almost surely, 2^47391747 is an apocalyptic number.

47391747 is a deficient number, since it is larger than the sum of its proper divisors (20657997).

47391747 is a wasteful number, since it uses less digits than its factorization.

47391747 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1215189.

The product of its digits is 148176, while the sum is 42.

The square root of 47391747 is about 6884.1663983376. The cubic root of 47391747 is about 361.8824924099.

The spelling of 47391747 in words is "forty-seven million, three hundred ninety-one thousand, seven hundred forty-seven".