691760972 has 48 divisors (see below), whose sum is σ = 1462056960. Its totient is φ = 279968832.

The previous prime is 691760963. The next prime is 691760977. The reversal of 691760972 is 279067196.

It is not an unprimeable number, because it can be changed into a prime (691760977) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 44078 + ... + 57674.

It is an arithmetic number, because the mean of its divisors is an integer number (30459520).

Almost surely, 2^691760972 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 691760972, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (731028480).

691760972 is an abundant number, since it is smaller than the sum of its proper divisors (770295988).

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

691760972 is a wasteful number, since it uses less digits than its factorization.

691760972 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13710 (or 13708 counting only the distinct ones).

The product of its (nonzero) digits is 285768, while the sum is 47.

The square root of 691760972 is about 26301.3492429571. The cubic root of 691760972 is about 884.4066892664.

The spelling of 691760972 in words is "six hundred ninety-one million, seven hundred sixty thousand, nine hundred seventy-two".