691047132 has 48 divisors (see below), whose sum is σ = 1630003200. Its totient is φ = 227852352.

The previous prime is 691047131. The next prime is 691047143. The reversal of 691047132 is 231740196.

It is a super-2 number, since 2×691047132² = 955092277290850848, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 691047093 and 691047102.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (691047131) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 912498 + ... + 913254.

It is an arithmetic number, because the mean of its divisors is an integer number (33958400).

Almost surely, 2^691047132 is an apocalyptic number.

It is an amenable number.

691047132 is an abundant number, since it is smaller than the sum of its proper divisors (938956068).

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

691047132 is a wasteful number, since it uses less digits than its factorization.

691047132 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1490 (or 1488 counting only the distinct ones).

The product of its (nonzero) digits is 9072, while the sum is 33.

The square root of 691047132 is about 26287.7753337935. The cubic root of 691047132 is about 884.1023730939.

The spelling of 691047132 in words is "six hundred ninety-one million, forty-seven thousand, one hundred thirty-two".