688157013 has 8 divisors (see below), whose sum is σ = 917856576. Its totient is φ = 458614400.

The previous prime is 688156999. The next prime is 688157023. The reversal of 688157013 is 310751886.

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

It is a cyclic number.

It is not a de Polignac number, because 688157013 - 2¹⁷ = 688025941 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (688157023) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 28593 + ... + 46838.

It is an arithmetic number, because the mean of its divisors is an integer number (114732072).

Almost surely, 2^688157013 is an apocalyptic number.

It is an amenable number.

688157013 is a deficient number, since it is larger than the sum of its proper divisors (229699563).

688157013 is a wasteful number, since it uses less digits than its factorization.

688157013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 78475.

The product of its (nonzero) digits is 40320, while the sum is 39.

The square root of 688157013 is about 26232.7469587156. The cubic root of 688157013 is about 882.8681439851.

The spelling of 688157013 in words is "six hundred eighty-eight million, one hundred fifty-seven thousand, thirteen".