697329649 has 3 divisors (see below), whose sum is σ = 697356057. Its totient is φ = 697303242.

The previous prime is 697329643. The next prime is 697329683. The reversal of 697329649 is 946923796.

The square root of 697329649 is 26407.

It is a perfect power (a square), and thus also a powerful number.

697329649 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is not a de Polignac number, because 697329649 - 2²⁹ = 160458737 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 697329649.

It is not an unprimeable number, because it can be changed into a prime (697329643) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 13204 + ... + 39610.

It is an arithmetic number, because the mean of its divisors is an integer number (232452019).

Almost surely, 2^697329649 is an apocalyptic number.

697329649 is the 26407-th square number.

697329649 is the 13204-th centered octagonal number.

It is an amenable number.

697329649 is a deficient number, since it is larger than the sum of its proper divisors (26408).

697329649 is an frugal number, since it uses more digits than its factorization.

697329649 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 52814 (or 26407 counting only the distinct ones).

The product of its digits is 4408992, while the sum is 55.

The cubic root of 697329649 is about 886.7735080674.

The spelling of 697329649 in words is "six hundred ninety-seven million, three hundred twenty-nine thousand, six hundred forty-nine".