691054944 has 36 divisors (see below), whose sum is σ = 1814695596. Its totient is φ = 230265792.

The previous prime is 691054907. The next prime is 691054961. The reversal of 691054944 is 449450196.

It is a junction number, because it is equal to n+sod(n) for n = 691054896 and 691054905.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 256227 + ... + 258909.

It is an arithmetic number, because the mean of its divisors is an integer number (50408211).

Almost surely, 2^691054944 is an apocalyptic number.

It is an amenable number.

691054944 is an abundant number, since it is smaller than the sum of its proper divisors (1123640652).

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

691054944 is an frugal number, since it uses more digits than its factorization.

691054944 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5379 (or 2688 counting only the distinct ones).

The product of its (nonzero) digits is 155520, while the sum is 42.

The square root of 691054944 is about 26287.9239195491. The cubic root of 691054944 is about 884.1057045510.

The spelling of 691054944 in words is "six hundred ninety-one million, fifty-four thousand, nine hundred forty-four".