1688342531 has 8 divisors (see below), whose sum is σ = 1763395584. Its totient is φ = 1613426760.

The previous prime is 1688342519. The next prime is 1688342569. The reversal of 1688342531 is 1352438861.

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 1688342531 - 2¹⁰ = 1688341507 is a prime.

It is a super-2 number, since 2×1688342531² = 5701001003966971922, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1688341531) 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, 8765 + ... + 58766.

It is an arithmetic number, because the mean of its divisors is an integer number (220424448).

Almost surely, 2^1688342531 is an apocalyptic number.

1688342531 is a deficient number, since it is larger than the sum of its proper divisors (75053053).

1688342531 is a wasteful number, since it uses less digits than its factorization.

1688342531 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 68641.

The product of its digits is 138240, while the sum is 41.

The square root of 1688342531 is about 41089.4454939465. The cubic root of 1688342531 is about 1190.7488944686.

The spelling of 1688342531 in words is "one billion, six hundred eighty-eight million, three hundred forty-two thousand, five hundred thirty-one".