688231873 has 8 divisors (see below), whose sum is σ = 799882560. Its totient is φ = 579914160.

The previous prime is 688231861. The next prime is 688231879. The reversal of 688231873 is 378132886.

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

It is not a de Polignac number, because 688231873 - 2²¹ = 686134721 is a prime.

It is a super-2 number, since 2×688231873² = 947326222026176258, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (688231879) 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, 832798 + ... + 833623.

It is an arithmetic number, because the mean of its divisors is an integer number (99985320).

Almost surely, 2^688231873 is an apocalyptic number.

It is an amenable number.

688231873 is a deficient number, since it is larger than the sum of its proper divisors (111650687).

688231873 is a wasteful number, since it uses less digits than its factorization.

688231873 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1666487.

The product of its digits is 387072, while the sum is 46.

The square root of 688231873 is about 26234.1737624801. The cubic root of 688231873 is about 882.9001565983.

The spelling of 688231873 in words is "six hundred eighty-eight million, two hundred thirty-one thousand, eight hundred seventy-three".