1691294968 has 16 divisors (see below), whose sum is σ = 3459467160. Its totient is φ = 768770400.

The previous prime is 1691294947. The next prime is 1691295017. The reversal of 1691294968 is 8694921961.

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 9609543 + ... + 9609718.

Almost surely, 2^1691294968 is an apocalyptic number.

It is an amenable number.

1691294968 is an abundant number, since it is smaller than the sum of its proper divisors (1768172192).

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

1691294968 is a wasteful number, since it uses less digits than its factorization.

1691294968 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19219278 (or 19219274 counting only the distinct ones).

The product of its digits is 1679616, while the sum is 55.

The square root of 1691294968 is about 41125.3567522520. The cubic root of 1691294968 is about 1191.4425854200.

The spelling of 1691294968 in words is "one billion, six hundred ninety-one million, two hundred ninety-four thousand, nine hundred sixty-eight".