47731789 has 4 divisors (see below), whose sum is σ = 54550624. Its totient is φ = 40912956.

The previous prime is 47731771. The next prime is 47731793. The reversal of 47731789 is 98713774.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 98713774 = 2 ⋅49356887.

It is not a de Polignac number, because 47731789 - 2⁵ = 47731757 is a prime.

It is a super-2 number, since 2×47731789² = 4556647362281042, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (47731729) 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, 3409407 + ... + 3409420.

It is an arithmetic number, because the mean of its divisors is an integer number (13637656).

Almost surely, 2^47731789 is an apocalyptic number.

It is an amenable number.

47731789 is a deficient number, since it is larger than the sum of its proper divisors (6818835).

47731789 is an equidigital number, since it uses as much as digits as its factorization.

47731789 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6818834.

The product of its digits is 296352, while the sum is 46.

The square root of 47731789 is about 6908.8196531680. The cubic root of 47731789 is about 362.7459486679.

The spelling of 47731789 in words is "forty-seven million, seven hundred thirty-one thousand, seven hundred eighty-nine".