1689040507 has 8 divisors (see below), whose sum is σ = 2105816832. Its totient is φ = 1316135400.

The previous prime is 1689040501. The next prime is 1689040519. The reversal of 1689040507 is 7050409861.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1689040507 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1689040507.

It is not an unprimeable number, because it can be changed into a prime (1689040501) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10967719 + ... + 10967872.

It is an arithmetic number, because the mean of its divisors is an integer number (263227104).

Almost surely, 2^1689040507 is an apocalyptic number.

1689040507 is a deficient number, since it is larger than the sum of its proper divisors (416776325).

1689040507 is a wasteful number, since it uses less digits than its factorization.

1689040507 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21935609.

The product of its (nonzero) digits is 60480, while the sum is 40.

The square root of 1689040507 is about 41097.9379896364. The cubic root of 1689040507 is about 1190.9129606323.

The spelling of 1689040507 in words is "one billion, six hundred eighty-nine million, forty thousand, five hundred seven".