697491 has 20 divisors (see below), whose sum is σ = 1064800. Its totient is φ = 454896.

The previous prime is 697481. The next prime is 697507. The reversal of 697491 is 194796.

It is a de Polignac number, because none of the positive numbers 2^k-697491 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (697441) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 6345 + ... + 6453.

It is an arithmetic number, because the mean of its divisors is an integer number (53240).

2⁶⁹⁷⁴⁹¹ is an apocalyptic number.

697491 is a deficient number, since it is larger than the sum of its proper divisors (367309).

697491 is a wasteful number, since it uses less digits than its factorization.

697491 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 200 (or 191 counting only the distinct ones).

The product of its digits is 13608, while the sum is 36.

The square root of 697491 is about 835.1592662481. The cubic root of 697491 is about 88.6841897892.

The spelling of 697491 in words is "six hundred ninety-seven thousand, four hundred ninety-one".