1691293932 has 30 divisors (see below), whose sum is σ = 4421377268. Its totient is φ = 563764536.

The previous prime is 1691293889. The next prime is 1691293957. The reversal of 1691293932 is 2393921961.

It is a nude number because it is divisible by every one of its digits.

It is an unprimeable number.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 2609698 + ... + 2610345.

Almost surely, 2^1691293932 is an apocalyptic number.

1691293932 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1691293932 is an abundant number, since it is smaller than the sum of its proper divisors (2730083336).

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

1691293932 is a wasteful number, since it uses less digits than its factorization.

1691293932 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5220059 (or 5220048 counting only the distinct ones).

The product of its digits is 157464, while the sum is 45.

The square root of 1691293932 is about 41125.3441566147. The cubic root of 1691293932 is about 1191.4423421479.

The spelling of 1691293932 in words is "one billion, six hundred ninety-one million, two hundred ninety-three thousand, nine hundred thirty-two".