861332817 has 16 divisors (see below), whose sum is σ = 1158635520. Its totient is φ = 569149392.

The previous prime is 861332807. The next prime is 861332827. The reversal of 861332817 is 718233168.

It is an interprime number because it is at equal distance from previous prime (861332807) and next prime (861332827).

It is not a de Polignac number, because 861332817 - 2⁶ = 861332753 is a prime.

It is not an unprimeable number, because it can be changed into a prime (861332807) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 157198 + ... + 162584.

It is an arithmetic number, because the mean of its divisors is an integer number (72414720).

Almost surely, 2^861332817 is an apocalyptic number.

It is an amenable number.

861332817 is a deficient number, since it is larger than the sum of its proper divisors (297302703).

861332817 is a wasteful number, since it uses less digits than its factorization.

861332817 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5852.

The product of its digits is 48384, while the sum is 39.

The square root of 861332817 is about 29348.4721408117. The cubic root of 861332817 is about 951.4595540319.

The spelling of 861332817 in words is "eight hundred sixty-one million, three hundred thirty-two thousand, eight hundred seventeen".