691055229 has 16 divisors (see below), whose sum is σ = 931060800. Its totient is φ = 455890176.

The previous prime is 691055207. The next prime is 691055243. The reversal of 691055229 is 922550196.

691055229 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 691055229 - 2¹² = 691051133 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (691055269) 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, 279802 + ... + 282260.

It is an arithmetic number, because the mean of its divisors is an integer number (58191300).

Almost surely, 2^691055229 is an apocalyptic number.

It is an amenable number.

691055229 is a deficient number, since it is larger than the sum of its proper divisors (240005571).

691055229 is a wasteful number, since it uses less digits than its factorization.

691055229 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3404.

The product of its (nonzero) digits is 48600, while the sum is 39.

The square root of 691055229 is about 26287.9293402885. The cubic root of 691055229 is about 884.1058260899.

The spelling of 691055229 in words is "six hundred ninety-one million, fifty-five thousand, two hundred twenty-nine".