47142789 has 4 divisors (see below), whose sum is σ = 62857056. Its totient is φ = 31428524.

The previous prime is 47142787. The next prime is 47142841. The reversal of 47142789 is 98724174.

It is a happy number.

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 cyclic number.

It is not a de Polignac number, because 47142789 - 2¹ = 47142787 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 47142789.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (47142787) 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, 7857129 + ... + 7857134.

It is an arithmetic number, because the mean of its divisors is an integer number (15714264).

Almost surely, 2^47142789 is an apocalyptic number.

It is an amenable number.

47142789 is a deficient number, since it is larger than the sum of its proper divisors (15714267).

47142789 is a wasteful number, since it uses less digits than its factorization.

47142789 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15714266.

The product of its digits is 112896, while the sum is 42.

The square root of 47142789 is about 6866.0606609613. The cubic root of 47142789 is about 361.2477000049.

It can be divided in two parts, 4714 and 2789, that added together give a triangular number (7503 = T₁₂₂).

The spelling of 47142789 in words is "forty-seven million, one hundred forty-two thousand, seven hundred eighty-nine".