47388317997 has 4 divisors (see below), whose sum is σ = 63184424000. Its totient is φ = 31592211996.

The previous prime is 47388317983. The next prime is 47388318037. The reversal of 47388317997 is 79971388374.

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.

It is a de Polignac number, because none of the positive numbers 2^k-47388317997 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (47388317917) 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, 7898052997 + ... + 7898053002.

It is an arithmetic number, because the mean of its divisors is an integer number (15796106000).

Almost surely, 2^47388317997 is an apocalyptic number.

It is an amenable number.

47388317997 is a deficient number, since it is larger than the sum of its proper divisors (15796106003).

47388317997 is a wasteful number, since it uses less digits than its factorization.

47388317997 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15796106002.

The product of its digits is 64012032, while the sum is 66.

The spelling of 47388317997 in words is "forty-seven billion, three hundred eighty-eight million, three hundred seventeen thousand, nine hundred ninety-seven".