47142279 has 6 divisors (see below), whose sum is σ = 68094416. Its totient is φ = 31428180.

The previous prime is 47142247. The next prime is 47142299. The reversal of 47142279 is 97224174.

It is not a de Polignac number, because 47142279 - 2⁵ = 47142247 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 (47142209) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2619007 + ... + 2619024.

Almost surely, 2^47142279 is an apocalyptic number.

47142279 is a deficient number, since it is larger than the sum of its proper divisors (20952137).

47142279 is a wasteful number, since it uses less digits than its factorization.

47142279 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5238037 (or 5238034 counting only the distinct ones).

The product of its digits is 28224, while the sum is 36.

The square root of 47142279 is about 6866.0235216608. The cubic root of 47142279 is about 361.2463973172.

The spelling of 47142279 in words is "forty-seven million, one hundred forty-two thousand, two hundred seventy-nine".