861698 has 16 divisors (see below), whose sum is σ = 1347840. Its totient is φ = 412896.

The previous prime is 861691. The next prime is 861701. The reversal of 861698 is 896168.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 861698.

It is not an unprimeable number, because it can be changed into a prime (861691) by changing a digit.

861698 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8315 + ... + 8417.

It is an arithmetic number, because the mean of its divisors is an integer number (84240).

2⁸⁶¹⁶⁹⁸ is an apocalyptic number.

861698 is a deficient number, since it is larger than the sum of its proper divisors (486142).

861698 is a wasteful number, since it uses less digits than its factorization.

861698 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 241.

The product of its digits is 20736, while the sum is 38.

The square root of 861698 is about 928.2768983445. The cubic root of 861698 is about 95.1593999841.

The spelling of 861698 in words is "eight hundred sixty-one thousand, six hundred ninety-eight".