427534691 has 4 divisors (see below), whose sum is σ = 428170632. Its totient is φ = 426898752.

The previous prime is 427534669. The next prime is 427534693. The reversal of 427534691 is 196435724.

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 427534691 - 2²⁶ = 360425827 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (427534693) 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 3 ways as a sum of consecutive naturals, for example, 316961 + ... + 318306.

It is an arithmetic number, because the mean of its divisors is an integer number (107042658).

Almost surely, 2^427534691 is an apocalyptic number.

427534691 is a deficient number, since it is larger than the sum of its proper divisors (635941).

427534691 is an equidigital number, since it uses as much as digits as its factorization.

427534691 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 635940.

The product of its digits is 181440, while the sum is 41.

The square root of 427534691 is about 20676.9120276699. The cubic root of 427534691 is about 753.3390036425.

The spelling of 427534691 in words is "four hundred twenty-seven million, five hundred thirty-four thousand, six hundred ninety-one".