47531791 has 8 divisors (see below), whose sum is σ = 48906000. Its totient is φ = 46162368.

The previous prime is 47531789. The next prime is 47531807. The reversal of 47531791 is 19713574.

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

It is a cyclic number.

It is not a de Polignac number, because 47531791 - 2¹ = 47531789 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (37).

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 47531791.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (47531761) 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, 30960 + ... + 32458.

It is an arithmetic number, because the mean of its divisors is an integer number (6113250).

Almost surely, 2^47531791 is an apocalyptic number.

47531791 is a deficient number, since it is larger than the sum of its proper divisors (1374209).

47531791 is a wasteful number, since it uses less digits than its factorization.

47531791 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2393.

The product of its digits is 26460, while the sum is 37.

The square root of 47531791 is about 6894.3303518181. The cubic root of 47531791 is about 362.2385996578.

The spelling of 47531791 in words is "forty-seven million, five hundred thirty-one thousand, seven hundred ninety-one".