691094 has 4 divisors (see below), whose sum is σ = 1036644. Its totient is φ = 345546.

The previous prime is 691079. The next prime is 691109. The reversal of 691094 is 490196.

691094 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is an interprime number because it is at equal distance from previous prime (691079) and next prime (691109).

It is a super-2 number, since 2×691094² = 955221833672, which contains 22 as substring.

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 691094.

It is an unprimeable number.

691094 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 as a sum of consecutive naturals, namely, 172772 + ... + 172775.

It is an arithmetic number, because the mean of its divisors is an integer number (259161).

2⁶⁹¹⁰⁹⁴ is an apocalyptic number.

691094 is a deficient number, since it is larger than the sum of its proper divisors (345550).

691094 is a wasteful number, since it uses less digits than its factorization.

691094 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 345549.

The product of its (nonzero) digits is 1944, while the sum is 29.

The square root of 691094 is about 831.3206360966. The cubic root of 691094 is about 88.4122359754.

The spelling of 691094 in words is "six hundred ninety-one thousand, ninety-four".