861694 has 4 divisors (see below), whose sum is σ = 1292544. Its totient is φ = 430846.

The previous prime is 861691. The next prime is 861701. The reversal of 861694 is 496168.

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

It is a congruent number.

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

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 215422 + ... + 215425.

It is an arithmetic number, because the mean of its divisors is an integer number (323136).

2⁸⁶¹⁶⁹⁴ is an apocalyptic number.

861694 is a deficient number, since it is larger than the sum of its proper divisors (430850).

861694 is a wasteful number, since it uses less digits than its factorization.

861694 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 430849.

The product of its digits is 10368, while the sum is 34.

The square root of 861694 is about 928.2747438124. The cubic root of 861694 is about 95.1592527406.

The spelling of 861694 in words is "eight hundred sixty-one thousand, six hundred ninety-four".