688157133 has 8 divisors (see below), whose sum is σ = 922297728. Its totient is φ = 456393984.

The previous prime is 688157131. The next prime is 688157207. The reversal of 688157133 is 331751886.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 688157133 - 2¹ = 688157131 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (688157131) 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 7 ways as a sum of consecutive naturals, for example, 593685 + ... + 594842.

It is an arithmetic number, because the mean of its divisors is an integer number (115287216).

Almost surely, 2^688157133 is an apocalyptic number.

It is an amenable number.

688157133 is a deficient number, since it is larger than the sum of its proper divisors (234140595).

688157133 is a wasteful number, since it uses less digits than its factorization.

688157133 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1188723.

The product of its digits is 120960, while the sum is 42.

The square root of 688157133 is about 26232.7492459330. The cubic root of 688157133 is about 882.8681953029.

The spelling of 688157133 in words is "six hundred eighty-eight million, one hundred fifty-seven thousand, one hundred thirty-three".