47072143 has 4 divisors (see below), whose sum is σ = 48166888. Its totient is φ = 45977400.

The previous prime is 47072131. The next prime is 47072149. The reversal of 47072143 is 34127074.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 47072143 - 2⁵ = 47072111 is a prime.

It is a super-2 number, since 2×47072143² = 4431573293224898, which contains 22 as substring.

It is an alternating number because its digits alternate between even and odd.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (47072149) 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, 547308 + ... + 547393.

It is an arithmetic number, because the mean of its divisors is an integer number (12041722).

Almost surely, 2^47072143 is an apocalyptic number.

47072143 is a gapful number since it is divisible by the number (43) formed by its first and last digit.

47072143 is a deficient number, since it is larger than the sum of its proper divisors (1094745).

47072143 is a wasteful number, since it uses less digits than its factorization.

47072143 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1094744.

The product of its (nonzero) digits is 4704, while the sum is 28.

The square root of 47072143 is about 6860.9141519188. The cubic root of 47072143 is about 361.0671601017.

The spelling of 47072143 in words is "forty-seven million, seventy-two thousand, one hundred forty-three".