47972787097 has 4 divisors (see below), whose sum is σ = 47973234960. Its totient is φ = 47972339236.

The previous prime is 47972787061. The next prime is 47972787199. The reversal of 47972787097 is 79078727974.

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, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-47972787097 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (47972787497) 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, 42054 + ... + 312592.

It is an arithmetic number, because the mean of its divisors is an integer number (11993308740).

Almost surely, 2^47972787097 is an apocalyptic number.

It is an amenable number.

47972787097 is a deficient number, since it is larger than the sum of its proper divisors (447863).

47972787097 is a wasteful number, since it uses less digits than its factorization.

47972787097 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 447862.

The product of its (nonzero) digits is 87127488, while the sum is 67.

The spelling of 47972787097 in words is "forty-seven billion, nine hundred seventy-two million, seven hundred eighty-seven thousand, ninety-seven".