691148204 has 12 divisors (see below), whose sum is σ = 1216753104. Its totient is φ = 343504464.

The previous prime is 691148201. The next prime is 691148219. The reversal of 691148204 is 402841196.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (691148201) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 516659 + ... + 517994.

It is an arithmetic number, because the mean of its divisors is an integer number (101396092).

Almost surely, 2^691148204 is an apocalyptic number.

It is an amenable number.

691148204 is a deficient number, since it is larger than the sum of its proper divisors (525604900).

691148204 is a wasteful number, since it uses less digits than its factorization.

691148204 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1034824 (or 1034822 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 35.

The square root of 691148204 is about 26289.6976779879. The cubic root of 691148204 is about 884.1454736943.

The spelling of 691148204 in words is "six hundred ninety-one million, one hundred forty-eight thousand, two hundred four".