697791 has 4 divisors (see below), whose sum is σ = 930392. Its totient is φ = 465192.

The previous prime is 697787. The next prime is 697819. The reversal of 697791 is 197796.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 697791 - 2² = 697787 is a prime.

It is a D-number.

It is a Duffinian number.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 697791.

It is not an unprimeable number, because it can be changed into a prime (697591) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 116296 + ... + 116301.

It is an arithmetic number, because the mean of its divisors is an integer number (232598).

2⁶⁹⁷⁷⁹¹ is an apocalyptic number.

697791 is a deficient number, since it is larger than the sum of its proper divisors (232601).

697791 is a wasteful number, since it uses less digits than its factorization.

697791 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 232600.

The product of its digits is 23814, while the sum is 39.

The square root of 697791 is about 835.3388534002. The cubic root of 697791 is about 88.6969027100.

The spelling of 697791 in words is "six hundred ninety-seven thousand, seven hundred ninety-one".