427917865 has 4 divisors (see below), whose sum is σ = 513501444. Its totient is φ = 342334288.

The previous prime is 427917817. The next prime is 427917877. The reversal of 427917865 is 568719724.

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 92698384 + 335219481 = 9628^2 + 18309^2 .

It is a cyclic number.

It is not a de Polignac number, because 427917865 - 2¹⁵ = 427885097 is a prime.

It is a super-2 number, since 2×427917865² = 366227398372316450, which contains 22 as substring.

It is a Smith number, since the sum of its digits (49) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 42791782 + ... + 42791791.

It is an arithmetic number, because the mean of its divisors is an integer number (128375361).

Almost surely, 2^427917865 is an apocalyptic number.

It is an amenable number.

427917865 is a deficient number, since it is larger than the sum of its proper divisors (85583579).

427917865 is an equidigital number, since it uses as much as digits as its factorization.

427917865 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 85583578.

The product of its digits is 846720, while the sum is 49.

The square root of 427917865 is about 20686.1756977939. The cubic root of 427917865 is about 753.5639941381.

The spelling of 427917865 in words is "four hundred twenty-seven million, nine hundred seventeen thousand, eight hundred sixty-five".