47123477938 has 4 divisors (see below), whose sum is σ = 70685216910. Its totient is φ = 23561738968.

The previous prime is 47123477927. The next prime is 47123477939. The reversal of 47123477938 is 83977432174.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 34083436689 + 13040041249 = 184617^2 + 114193^2 .

It is not an unprimeable number, because it can be changed into a prime (47123477939) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11780869483 + ... + 11780869486.

Almost surely, 2^47123477938 is an apocalyptic number.

47123477938 is a deficient number, since it is larger than the sum of its proper divisors (23561738972).

47123477938 is a wasteful number, since it uses less digits than its factorization.

47123477938 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23561738971.

The product of its digits is 7112448, while the sum is 55.

The spelling of 47123477938 in words is "forty-seven billion, one hundred twenty-three million, four hundred seventy-seven thousand, nine hundred thirty-eight".