861927827 has 4 divisors (see below), whose sum is σ = 864035640. Its totient is φ = 859820016.

The previous prime is 861927797. The next prime is 861927851. The reversal of 861927827 is 728729168.

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

It is a cyclic number.

It is not a de Polignac number, because 861927827 - 2¹² = 861923731 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (861927127) 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, 1053293 + ... + 1054110.

It is an arithmetic number, because the mean of its divisors is an integer number (216008910).

Almost surely, 2^861927827 is an apocalyptic number.

861927827 is a deficient number, since it is larger than the sum of its proper divisors (2107813).

861927827 is a wasteful number, since it uses less digits than its factorization.

861927827 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2107812.

The product of its digits is 677376, while the sum is 50.

The square root of 861927827 is about 29358.6073750101. The cubic root of 861927827 is about 951.6785934971.

The spelling of 861927827 in words is "eight hundred sixty-one million, nine hundred twenty-seven thousand, eight hundred twenty-seven".