691896 has 32 divisors (see below), whose sum is σ = 1751040. Its totient is φ = 227808.

The previous prime is 691891. The next prime is 691897. The reversal of 691896 is 698196.

691896 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (691891) by changing a digit.

691896 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 7 ways as a sum of consecutive naturals, for example, 2935 + ... + 3161.

It is an arithmetic number, because the mean of its divisors is an integer number (54720).

2⁶⁹¹⁸⁹⁶ is an apocalyptic number.

It is an amenable number.

691896 is an abundant number, since it is smaller than the sum of its proper divisors (1059144).

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

691896 is a wasteful number, since it uses less digits than its factorization.

691896 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 363 (or 359 counting only the distinct ones).

The product of its digits is 23328, while the sum is 39.

The square root of 691896 is about 831.8028612598. The cubic root of 691896 is about 88.4464229323.

It can be divided in two parts, 6918 and 96, that multiplied together give a triangular number (664128 = T₁₁₅₂).

The spelling of 691896 in words is "six hundred ninety-one thousand, eight hundred ninety-six".