1689670974 has 16 divisors (see below), whose sum is σ = 3401723520. Its totient is φ = 559493400.

The previous prime is 1689670951. The next prime is 1689670979. The reversal of 1689670974 is 4790769861.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1689670979) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 931584 + ... + 933395.

It is an arithmetic number, because the mean of its divisors is an integer number (212607720).

Almost surely, 2^1689670974 is an apocalyptic number.

1689670974 is an abundant number, since it is smaller than the sum of its proper divisors (1712052546).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1689670974 is a wasteful number, since it uses less digits than its factorization.

1689670974 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1865135.

The product of its (nonzero) digits is 4572288, while the sum is 57.

The square root of 1689670974 is about 41105.6075736632. The cubic root of 1689670974 is about 1191.0611192895.

The spelling of 1689670974 in words is "one billion, six hundred eighty-nine million, six hundred seventy thousand, nine hundred seventy-four".