861337427 has 4 divisors (see below), whose sum is σ = 861412440. Its totient is φ = 861262416.

The previous prime is 861337409. The next prime is 861337459. The reversal of 861337427 is 724733168.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 861337427 - 2²⁰ = 860288851 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (861337027) 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, 16277 + ... + 44582.

It is an arithmetic number, because the mean of its divisors is an integer number (215353110).

Almost surely, 2^861337427 is an apocalyptic number.

861337427 is a deficient number, since it is larger than the sum of its proper divisors (75013).

861337427 is a wasteful number, since it uses less digits than its factorization.

861337427 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 75012.

The product of its digits is 169344, while the sum is 41.

The square root of 861337427 is about 29348.5506797184. The cubic root of 861337427 is about 951.4612514868.

The spelling of 861337427 in words is "eight hundred sixty-one million, three hundred thirty-seven thousand, four hundred twenty-seven".