1691916924 has 12 divisors (see below), whose sum is σ = 3947806184. Its totient is φ = 563972304.

The previous prime is 1691916907. The next prime is 1691916943. The reversal of 1691916924 is 4296191961.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (12).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 70496527 + ... + 70496550.

Almost surely, 2^1691916924 is an apocalyptic number.

It is an amenable number.

1691916924 is an abundant number, since it is smaller than the sum of its proper divisors (2255889260).

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

1691916924 is a wasteful number, since it uses less digits than its factorization.

1691916924 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 140993084 (or 140993082 counting only the distinct ones).

The product of its digits is 209952, while the sum is 48.

The square root of 1691916924 is about 41132.9177666744. The cubic root of 1691916924 is about 1191.5886143628.

The spelling of 1691916924 in words is "one billion, six hundred ninety-one million, nine hundred sixteen thousand, nine hundred twenty-four".