47185342989 has 4 divisors (see below), whose sum is σ = 62913790656. Its totient is φ = 31456895324.

The previous prime is 47185342979. The next prime is 47185342999. The reversal of 47185342989 is 98924358174.

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 an interprime number because it is at equal distance from previous prime (47185342979) and next prime (47185342999).

It is a cyclic number.

It is not a de Polignac number, because 47185342989 - 2¹¹ = 47185340941 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (47185342909) 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, 7864223829 + ... + 7864223834.

It is an arithmetic number, because the mean of its divisors is an integer number (15728447664).

Almost surely, 2^47185342989 is an apocalyptic number.

It is an amenable number.

47185342989 is a deficient number, since it is larger than the sum of its proper divisors (15728447667).

47185342989 is a wasteful number, since it uses less digits than its factorization.

47185342989 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15728447666.

The product of its digits is 17418240, while the sum is 60.

The spelling of 47185342989 in words is "forty-seven billion, one hundred eighty-five million, three hundred forty-two thousand, nine hundred eighty-nine".