427994143 has 8 divisors (see below), whose sum is σ = 446829408. Its totient is φ = 409177824.

The previous prime is 427994131. The next prime is 427994197. The reversal of 427994143 is 341499724.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 427994143 - 2⁵ = 427994111 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 427994143.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (427994243) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 61005 + ... + 67657.

It is an arithmetic number, because the mean of its divisors is an integer number (55853676).

Almost surely, 2^427994143 is an apocalyptic number.

427994143 is a deficient number, since it is larger than the sum of its proper divisors (18835265).

427994143 is a wasteful number, since it uses less digits than its factorization.

427994143 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9473.

The product of its digits is 217728, while the sum is 43.

The square root of 427994143 is about 20688.0193107025. The cubic root of 427994143 is about 753.6087667015.

The spelling of 427994143 in words is "four hundred twenty-seven million, nine hundred ninety-four thousand, one hundred forty-three".