47909938723 has 4 divisors (see below), whose sum is σ = 47950099128. Its totient is φ = 47869778320.

The previous prime is 47909938721. The next prime is 47909938757. The reversal of 47909938723 is 32783990974.

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

It is a cyclic number.

It is not a de Polignac number, because 47909938723 - 2¹ = 47909938721 is a prime.

It is a super-2 number, since 2×47909938723² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (47909938721) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 20078413 + ... + 20080798.

It is an arithmetic number, because the mean of its divisors is an integer number (11987524782).

Almost surely, 2^47909938723 is an apocalyptic number.

47909938723 is a deficient number, since it is larger than the sum of its proper divisors (40160405).

47909938723 is a wasteful number, since it uses less digits than its factorization.

47909938723 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40160404.

The product of its (nonzero) digits is 20575296, while the sum is 61.

The spelling of 47909938723 in words is "forty-seven billion, nine hundred nine million, nine hundred thirty-eight thousand, seven hundred twenty-three".