1689630903 has 12 divisors (see below), whose sum is σ = 2444567320. Its totient is φ = 1124579376.

The previous prime is 1689630889. The next prime is 1689630931. The reversal of 1689630903 is 3090369861.

1689630903 is a `hidden beast` number, since 1 + 6 + 8 + 9 + 630 + 9 + 0 + 3 = 666.

It is not a de Polignac number, because 1689630903 - 2¹⁴ = 1689614519 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1689630953) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 147613 + ... + 158646.

Almost surely, 2^1689630903 is an apocalyptic number.

1689630903 is a deficient number, since it is larger than the sum of its proper divisors (754936417).

1689630903 is a wasteful number, since it uses less digits than its factorization.

1689630903 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 306878 (or 306875 counting only the distinct ones).

The product of its (nonzero) digits is 209952, while the sum is 45.

The square root of 1689630903 is about 41105.1201555232. The cubic root of 1689630903 is about 1191.0517037705.

The spelling of 1689630903 in words is "one billion, six hundred eighty-nine million, six hundred thirty thousand, nine hundred three".