691327 has 16 divisors (see below), whose sum is σ = 870912. Its totient is φ = 534240.

The previous prime is 691309. The next prime is 691333. The reversal of 691327 is 723196.

It is not a de Polignac number, because 691327 - 2⁷ = 691199 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 691295 and 691304.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (691337) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6408 + ... + 6514.

It is an arithmetic number, because the mean of its divisors is an integer number (54432).

2⁶⁹¹³²⁷ is an apocalyptic number.

691327 is a deficient number, since it is larger than the sum of its proper divisors (179585).

691327 is a wasteful number, since it uses less digits than its factorization.

691327 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 198.

The product of its digits is 2268, while the sum is 28.

The square root of 691327 is about 831.4607627543. The cubic root of 691327 is about 88.4221708209.

The spelling of 691327 in words is "six hundred ninety-one thousand, three hundred twenty-seven".