427791931 has 8 divisors (see below), whose sum is σ = 489251840. Its totient is φ = 366418728.

The previous prime is 427791911. The next prime is 427791937. The reversal of 427791931 is 139197724.

It is a happy number.

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 427791931 - 2⁷ = 427791803 is a prime.

It is a super-2 number, since 2×427791931² = 366011872457417522, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (427791937) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10731 + ... + 31156.

It is an arithmetic number, because the mean of its divisors is an integer number (61156480).

Almost surely, 2^427791931 is an apocalyptic number.

427791931 is a deficient number, since it is larger than the sum of its proper divisors (61459909).

427791931 is a wasteful number, since it uses less digits than its factorization.

427791931 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43353.

The product of its digits is 95256, while the sum is 43.

The square root of 427791931 is about 20683.1315568992. The cubic root of 427791931 is about 753.4900635649.

The spelling of 427791931 in words is "four hundred twenty-seven million, seven hundred ninety-one thousand, nine hundred thirty-one".