427931983 has 4 divisors (see below), whose sum is σ = 428387688. Its totient is φ = 427476280.

The previous prime is 427931971. The next prime is 427931993. The reversal of 427931983 is 389139724.

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 427931983 - 2²¹ = 425834831 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 (427931923) 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, 226441 + ... + 228322.

It is an arithmetic number, because the mean of its divisors is an integer number (107096922).

Almost surely, 2^427931983 is an apocalyptic number.

427931983 is a deficient number, since it is larger than the sum of its proper divisors (455705).

427931983 is an equidigital number, since it uses as much as digits as its factorization.

427931983 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 455704.

The product of its digits is 326592, while the sum is 46.

The square root of 427931983 is about 20686.5169373677. The cubic root of 427931983 is about 753.5722813199.

The spelling of 427931983 in words is "four hundred twenty-seven million, nine hundred thirty-one thousand, nine hundred eighty-three".