427388691 has 8 divisors (see below), whose sum is σ = 594627840. Its totient is φ = 272537672.

The previous prime is 427388683. The next prime is 427388701. The reversal of 427388691 is 196883724.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 427388691 - 2³ = 427388683 is a prime.

It is a super-2 number, since 2×427388691² = 365322186389386962, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 427388691.

It is not an unprimeable number, because it can be changed into a prime (427388681) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3096951 + ... + 3097088.

It is an arithmetic number, because the mean of its divisors is an integer number (74328480).

Almost surely, 2^427388691 is an apocalyptic number.

427388691 is a deficient number, since it is larger than the sum of its proper divisors (167239149).

427388691 is a wasteful number, since it uses less digits than its factorization.

427388691 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6194065.

The product of its digits is 580608, while the sum is 48.

The square root of 427388691 is about 20673.3812183687. The cubic root of 427388691 is about 753.2532406083.

The spelling of 427388691 in words is "four hundred twenty-seven million, three hundred eighty-eight thousand, six hundred ninety-one".