47731923 has 20 divisors (see below), whose sum is σ = 74406288. Its totient is φ = 30436560.

The previous prime is 47731891. The next prime is 47731927. The reversal of 47731923 is 32913774.

47731923 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 47731923 - 2⁵ = 47731891 is a prime.

It is a super-3 number, since 3×47731923³ (a number of 24 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (47731927) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 10948 + ... + 14673.

Almost surely, 2^47731923 is an apocalyptic number.

47731923 is a deficient number, since it is larger than the sum of its proper divisors (26674365).

47731923 is a wasteful number, since it uses less digits than its factorization.

47731923 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25656 (or 25647 counting only the distinct ones).

The product of its digits is 31752, while the sum is 36.

The square root of 47731923 is about 6908.8293509103. The cubic root of 47731923 is about 362.7462881196.

It can be divided in two parts, 477 and 31923, that added together give a square (32400 = 180²).

The spelling of 47731923 in words is "forty-seven million, seven hundred thirty-one thousand, nine hundred twenty-three".