427600861 has 4 divisors (see below), whose sum is σ = 428138172. Its totient is φ = 427063552.

The previous prime is 427600841. The next prime is 427600879. The reversal of 427600861 is 168006724.

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 148376761 + 279224100 = 12181^2 + 16710^2 .

It is a cyclic number.

It is not a de Polignac number, because 427600861 - 2⁵ = 427600829 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (427600801) 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 3 ways as a sum of consecutive naturals, for example, 267460 + ... + 269053.

It is an arithmetic number, because the mean of its divisors is an integer number (107034543).

Almost surely, 2^427600861 is an apocalyptic number.

It is an amenable number.

427600861 is a deficient number, since it is larger than the sum of its proper divisors (537311).

427600861 is an equidigital number, since it uses as much as digits as its factorization.

427600861 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 537310.

The product of its (nonzero) digits is 16128, while the sum is 34.

The square root of 427600861 is about 20678.5120596236. The cubic root of 427600861 is about 753.3778666645.

The spelling of 427600861 in words is "four hundred twenty-seven million, six hundred thousand, eight hundred sixty-one".