1689521492 has 48 divisors (see below), whose sum is σ = 3069964800. Its totient is φ = 813146880.

The previous prime is 1689521461. The next prime is 1689521497. The reversal of 1689521492 is 2941259861.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1689521497) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4706009 + ... + 4706367.

It is an arithmetic number, because the mean of its divisors is an integer number (63957600).

Almost surely, 2^1689521492 is an apocalyptic number.

It is an amenable number.

1689521492 is a deficient number, since it is larger than the sum of its proper divisors (1380443308).

1689521492 is a wasteful number, since it uses less digits than its factorization.

1689521492 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 776 (or 774 counting only the distinct ones).

The product of its digits is 311040, while the sum is 47.

The square root of 1689521492 is about 41103.7892657113. The cubic root of 1689521492 is about 1191.0259946111.

The spelling of 1689521492 in words is "one billion, six hundred eighty-nine million, five hundred twenty-one thousand, four hundred ninety-two".