1688225539 has 32 divisors (see below), whose sum is σ = 2290208256. Its totient is φ = 1201720320.

The previous prime is 1688225491. The next prime is 1688225543. The reversal of 1688225539 is 9355228861.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 1688225539 - 2¹³ = 1688217347 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1688225492 and 1688225501.

It is not an unprimeable number, because it can be changed into a prime (1688225549) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 88404 + ... + 105790.

It is an arithmetic number, because the mean of its divisors is an integer number (71569008).

Almost surely, 2^1688225539 is an apocalyptic number.

1688225539 is a deficient number, since it is larger than the sum of its proper divisors (601982717).

1688225539 is a wasteful number, since it uses less digits than its factorization.

1688225539 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17515.

The product of its digits is 1036800, while the sum is 49.

The square root of 1688225539 is about 41088.0218433548. The cubic root of 1688225539 is about 1190.7213899170.

The spelling of 1688225539 in words is "one billion, six hundred eighty-eight million, two hundred twenty-five thousand, five hundred thirty-nine".