427891939 has 4 divisors (see below), whose sum is σ = 439456624. Its totient is φ = 416327256.

The previous prime is 427891873. The next prime is 427891957. The reversal of 427891939 is 939198724.

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 427891939 - 2⁷ = 427891811 is a prime.

It is a super-2 number, since 2×427891939² = 366183022922359442, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (427891339) 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, 5782287 + ... + 5782360.

It is an arithmetic number, because the mean of its divisors is an integer number (109864156).

Almost surely, 2^427891939 is an apocalyptic number.

427891939 is a deficient number, since it is larger than the sum of its proper divisors (11564685).

427891939 is a wasteful number, since it uses less digits than its factorization.

427891939 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11564684.

The product of its digits is 979776, while the sum is 52.

The square root of 427891939 is about 20685.5490379153. The cubic root of 427891939 is about 753.5487752559.

The spelling of 427891939 in words is "four hundred twenty-seven million, eight hundred ninety-one thousand, nine hundred thirty-nine".