691121196 has 36 divisors (see below), whose sum is σ = 1849767192. Its totient is φ = 216822144.

The previous prime is 691121177. The next prime is 691121201.

691121196 is nontrivially palindromic in base 10.

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a nude number because it is divisible by every one of its digits.

It is a self number, because there is not a number n which added to its sum of digits gives 691121196.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 564030 + ... + 565253.

It is an arithmetic number, because the mean of its divisors is an integer number (51382422).

Almost surely, 2^691121196 is an apocalyptic number.

It is an amenable number.

691121196 is an abundant number, since it is smaller than the sum of its proper divisors (1158645996).

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

691121196 is a wasteful number, since it uses less digits than its factorization.

691121196 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1129310 (or 1129305 counting only the distinct ones).

The product of its digits is 5832, while the sum is 36.

The square root of 691121196 is about 26289.1840116805. The cubic root of 691121196 is about 884.1339569593.

The spelling of 691121196 in words is "six hundred ninety-one million, one hundred twenty-one thousand, one hundred ninety-six".