691494 has 8 divisors (see below), whose sum is σ = 1383000. Its totient is φ = 230496.

The previous prime is 691489. The next prime is 691499. The reversal of 691494 is 494196.

It is an interprime number because it is at equal distance from previous prime (691489) and next prime (691499).

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

691494 is an admirable number.

It is a Curzon number.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 691494.

It is not an unprimeable number, because it can be changed into a prime (691499) by changing a digit.

691494 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 57619 + ... + 57630.

It is an arithmetic number, because the mean of its divisors is an integer number (172875).

691494 is a Friedman number, since it can be written as 14^4*(9+9)+6, using all its digits and the basic arithmetic operations.

2⁶⁹¹⁴⁹⁴ is an apocalyptic number.

691494 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

691494 is a wasteful number, since it uses less digits than its factorization.

691494 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 115254.

The product of its digits is 7776, while the sum is 33.

The square root of 691494 is about 831.5611823552. The cubic root of 691494 is about 88.4292901309.

The spelling of 691494 in words is "six hundred ninety-one thousand, four hundred ninety-four".