1689012031 has 8 divisors (see below), whose sum is σ = 1942143104. Its totient is φ = 1438841880.

The previous prime is 1689011983. The next prime is 1689012041. The reversal of 1689012031 is 1302109861.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a de Polignac number, because none of the positive numbers 2^k-1689012031 is a prime.

It is a super-2 number, since 2×1689012031² = 5705523281725489922, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1689011984 and 1689012002.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1689012041) 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, 739005 + ... + 741286.

It is an arithmetic number, because the mean of its divisors is an integer number (242767888).

Almost surely, 2^1689012031 is an apocalyptic number.

1689012031 is a deficient number, since it is larger than the sum of its proper divisors (253131073).

1689012031 is a wasteful number, since it uses less digits than its factorization.

1689012031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1480461.

The product of its (nonzero) digits is 2592, while the sum is 31.

The square root of 1689012031 is about 41097.5915474374. The cubic root of 1689012031 is about 1190.9062679513.

The spelling of 1689012031 in words is "one billion, six hundred eighty-nine million, twelve thousand, thirty-one".