427799108861 has 4 divisors (see below), whose sum is σ = 442550802300. Its totient is φ = 413047415424.

The previous prime is 427799108857. The next prime is 427799108881. The reversal of 427799108861 is 168801997724.

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 76261584025 + 351537524836 = 276155^2 + 592906^2 .

It is a cyclic number.

It is not a de Polignac number, because 427799108861 - 2² = 427799108857 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 427799108794 and 427799108803.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (427799108881) 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, 7375846676 + ... + 7375846733.

It is an arithmetic number, because the mean of its divisors is an integer number (110637700575).

Almost surely, 2^427799108861 is an apocalyptic number.

It is an amenable number.

427799108861 is a deficient number, since it is larger than the sum of its proper divisors (14751693439).

427799108861 is a wasteful number, since it uses less digits than its factorization.

427799108861 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14751693438.

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

The spelling of 427799108861 in words is "four hundred twenty-seven billion, seven hundred ninety-nine million, one hundred eight thousand, eight hundred sixty-one".