427091857 has 4 divisors (see below), whose sum is σ = 427727140. Its totient is φ = 426456576.

The previous prime is 427091843. The next prime is 427091879. The reversal of 427091857 is 758190724.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 201611601 + 225480256 = 14199^2 + 15016^2 .

It is a cyclic number.

It is not a de Polignac number, because 427091857 - 2¹⁵ = 427059089 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (427091827) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 316632 + ... + 317977.

It is an arithmetic number, because the mean of its divisors is an integer number (106931785).

Almost surely, 2^427091857 is an apocalyptic number.

It is an amenable number.

427091857 is a deficient number, since it is larger than the sum of its proper divisors (635283).

427091857 is an equidigital number, since it uses as much as digits as its factorization.

427091857 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 635282.

The product of its (nonzero) digits is 141120, while the sum is 43.

The square root of 427091857 is about 20666.2008361479. The cubic root of 427091857 is about 753.0788147203.

The spelling of 427091857 in words is "four hundred twenty-seven million, ninety-one thousand, eight hundred fifty-seven".