427921983 has 12 divisors (see below), whose sum is σ = 634815688. Its totient is φ = 277570800.

The previous prime is 427921973. The next prime is 427921987. The reversal of 427921983 is 389129724.

427921983 is a `hidden beast` number, since 427 + 9 + 219 + 8 + 3 = 666.

It is not a de Polignac number, because 427921983 - 2⁶ = 427921919 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 (427921987) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 642193 + ... + 642858.

Almost surely, 2^427921983 is an apocalyptic number.

427921983 is a deficient number, since it is larger than the sum of its proper divisors (206893705).

427921983 is a wasteful number, since it uses less digits than its factorization.

427921983 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1285094 (or 1285091 counting only the distinct ones).

The product of its digits is 217728, while the sum is 45.

The square root of 427921983 is about 20686.2752326271. The cubic root of 427921983 is about 753.5664113983.

It can be divided in two parts, 4279 and 21983, that added together give a palindrome (26262).

The spelling of 427921983 in words is "four hundred twenty-seven million, nine hundred twenty-one thousand, nine hundred eighty-three".