1688923106 has 32 divisors (see below), whose sum is σ = 2892017520. Its totient is φ = 732819456.

The previous prime is 1688923087. The next prime is 1688923139. The reversal of 1688923106 is 6013298861.

It can be written as a sum of positive squares in 8 ways, for example, as 1368334081 + 320589025 = 36991^2 + 17905^2 .

It is a super-2 number, since 2×1688923106² = 5704922515961374472, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 545210 + ... + 548298.

Almost surely, 2^1688923106 is an apocalyptic number.

1688923106 is a deficient number, since it is larger than the sum of its proper divisors (1203094414).

1688923106 is a wasteful number, since it uses less digits than its factorization.

1688923106 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4358.

The product of its (nonzero) digits is 124416, while the sum is 44.

The square root of 1688923106 is about 41096.5096571473. The cubic root of 1688923106 is about 1190.8853675282.

The spelling of 1688923106 in words is "one billion, six hundred eighty-eight million, nine hundred twenty-three thousand, one hundred six".