691000552 has 32 divisors (see below), whose sum is σ = 1447891200. Its totient is φ = 306428800.

The previous prime is 691000501. The next prime is 691000559. The reversal of 691000552 is 255000196.

It is a self number, because there is not a number n which added to its sum of digits gives 691000552.

It is not an unprimeable number, because it can be changed into a prime (691000559) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 92152 + ... + 99367.

It is an arithmetic number, because the mean of its divisors is an integer number (45246600).

Almost surely, 2^691000552 is an apocalyptic number.

It is an amenable number.

691000552 is an abundant number, since it is smaller than the sum of its proper divisors (756890648).

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

691000552 is a wasteful number, since it uses less digits than its factorization.

691000552 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 191577 (or 191573 counting only the distinct ones).

The product of its (nonzero) digits is 2700, while the sum is 28.

The square root of 691000552 is about 26286.8893557226. The cubic root of 691000552 is about 884.0825083543.

The spelling of 691000552 in words is "six hundred ninety-one million, five hundred fifty-two", and thus it is an aban number.