1691239332 has 12 divisors (see below), whose sum is σ = 3946225136. Its totient is φ = 563746440.

The previous prime is 1691239279. The next prime is 1691239337. The reversal of 1691239332 is 2339321961.

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

It is not an unprimeable number, because it can be changed into a prime (1691239337) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 70468294 + ... + 70468317.

Almost surely, 2^1691239332 is an apocalyptic number.

1691239332 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1691239332 is an abundant number, since it is smaller than the sum of its proper divisors (2254985804).

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

1691239332 is a wasteful number, since it uses less digits than its factorization.

1691239332 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 140936618 (or 140936616 counting only the distinct ones).

The product of its digits is 52488, while the sum is 39.

The square root of 1691239332 is about 41124.6803270250. The cubic root of 1691239332 is about 1191.4295209087.

The spelling of 1691239332 in words is "one billion, six hundred ninety-one million, two hundred thirty-nine thousand, three hundred thirty-two".