691592994 has 48 divisors (see below), whose sum is σ = 1537522272. Its totient is φ = 224550144.

The previous prime is 691592987. The next prime is 691592999. The reversal of 691592994 is 499295196.

691592994 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a self number, because there is not a number n which added to its sum of digits gives 691592994.

It is not an unprimeable number, because it can be changed into a prime (691592999) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 341874 + ... + 343890.

It is an arithmetic number, because the mean of its divisors is an integer number (32031714).

Almost surely, 2^691592994 is an apocalyptic number.

691592994 is an abundant number, since it is smaller than the sum of its proper divisors (845929278).

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

691592994 is a wasteful number, since it uses less digits than its factorization.

691592994 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2511 (or 2508 counting only the distinct ones).

The product of its digits is 1574640, while the sum is 54.

The square root of 691592994 is about 26298.1557148025. The cubic root of 691592994 is about 884.3350976332.

The spelling of 691592994 in words is "six hundred ninety-one million, five hundred ninety-two thousand, nine hundred ninety-four".