427994139 has 4 divisors (see below), whose sum is σ = 570658856. Its totient is φ = 285329424.

The previous prime is 427994131. The next prime is 427994197. The reversal of 427994139 is 931499724.

It is a happy number.

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

It is not a de Polignac number, because 427994139 - 2³ = 427994131 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (427994131) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 71332354 + ... + 71332359.

It is an arithmetic number, because the mean of its divisors is an integer number (142664714).

Almost surely, 2^427994139 is an apocalyptic number.

427994139 is a deficient number, since it is larger than the sum of its proper divisors (142664717).

427994139 is a wasteful number, since it uses less digits than its factorization.

427994139 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 142664716.

The product of its digits is 489888, while the sum is 48.

The square root of 427994139 is about 20688.0192140282. The cubic root of 427994139 is about 753.6087643538.

The spelling of 427994139 in words is "four hundred twenty-seven million, nine hundred ninety-four thousand, one hundred thirty-nine".