47993179797 has 12 divisors (see below), whose sum is σ = 69829494540. Its totient is φ = 31761908928.

The previous prime is 47993179771. The next prime is 47993179841. The reversal of 47993179797 is 79797139974.

It can be written as a sum of positive squares in 2 ways, for example, as 23429200356 + 24563979441 = 153066^2 + 156729^2 .

It is not a de Polignac number, because 47993179797 - 2⁸ = 47993179541 is a prime.

It is a super-2 number, since 2×47993179797² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (47993179727) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 19460722 + ... + 19463187.

It is an arithmetic number, because the mean of its divisors is an integer number (5819124545).

Almost surely, 2^47993179797 is an apocalyptic number.

It is an amenable number.

47993179797 is a deficient number, since it is larger than the sum of its proper divisors (21836314743).

47993179797 is a wasteful number, since it uses less digits than its factorization.

47993179797 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38924052 (or 38924049 counting only the distinct ones).

The product of its digits is 189035532, while the sum is 72.

The spelling of 47993179797 in words is "forty-seven billion, nine hundred ninety-three million, one hundred seventy-nine thousand, seven hundred ninety-seven".