427187869109 has 4 divisors (see below), whose sum is σ = 427414015980. Its totient is φ = 426961722240.

The previous prime is 427187869067. The next prime is 427187869127. The reversal of 427187869109 is 901968781724.

It is a happy number.

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 191401875025 + 235785994084 = 437495^2 + 485578^2 .

It is a cyclic number.

It is not a de Polignac number, because 427187869109 - 2²⁸ = 426919433653 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 (427187869139) 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, 113070602 + ... + 113074379.

It is an arithmetic number, because the mean of its divisors is an integer number (106853503995).

Almost surely, 2^427187869109 is an apocalyptic number.

It is an amenable number.

427187869109 is a deficient number, since it is larger than the sum of its proper divisors (226146871).

427187869109 is a wasteful number, since it uses less digits than its factorization.

427187869109 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 226146870.

The product of its (nonzero) digits is 12192768, while the sum is 62.

The spelling of 427187869109 in words is "four hundred twenty-seven billion, one hundred eighty-seven million, eight hundred sixty-nine thousand, one hundred nine".