691694 has 8 divisors (see below), whose sum is σ = 1041768. Its totient is φ = 344440.

The previous prime is 691693. The next prime is 691697. The reversal of 691694 is 496196.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (691693) 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, 89 + ... + 1179.

It is an arithmetic number, because the mean of its divisors is an integer number (130221).

2⁶⁹¹⁶⁹⁴ is an apocalyptic number.

691694 is a deficient number, since it is larger than the sum of its proper divisors (350074).

691694 is a wasteful number, since it uses less digits than its factorization.

691694 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1410.

The product of its digits is 11664, while the sum is 35.

The square root of 691694 is about 831.6814293947. The cubic root of 691694 is about 88.4378147425.

It can be divided in two parts, 69169 and 4, that multiplied together give a square (276676 = 526²).

The spelling of 691694 in words is "six hundred ninety-one thousand, six hundred ninety-four".