861313847 has 4 divisors (see below), whose sum is σ = 861410976. Its totient is φ = 861216720.

The previous prime is 861313829. The next prime is 861313879. The reversal of 861313847 is 748313168.

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 861313847 - 2¹² = 861309751 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 (861303847) 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, 33758 + ... + 53499.

It is an arithmetic number, because the mean of its divisors is an integer number (215352744).

Almost surely, 2^861313847 is an apocalyptic number.

861313847 is a deficient number, since it is larger than the sum of its proper divisors (97129).

861313847 is an equidigital number, since it uses as much as digits as its factorization.

861313847 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 97128.

The product of its digits is 96768, while the sum is 41.

The square root of 861313847 is about 29348.1489535541. The cubic root of 861313847 is about 951.4525689967.

The spelling of 861313847 in words is "eight hundred sixty-one million, three hundred thirteen thousand, eight hundred forty-seven".