697091 has 6 divisors (see below), whose sum is σ = 736092. Its totient is φ = 660060.

The previous prime is 697087. The next prime is 697093. The reversal of 697091 is 190796.

It is not a de Polignac number, because 697091 - 2² = 697087 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (697093) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 605 + ... + 1326.

It is an arithmetic number, because the mean of its divisors is an integer number (122682).

2⁶⁹⁷⁰⁹¹ is an apocalyptic number.

697091 is a deficient number, since it is larger than the sum of its proper divisors (39001).

697091 is a wasteful number, since it uses less digits than its factorization.

697091 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1969 (or 1950 counting only the distinct ones).

The product of its (nonzero) digits is 3402, while the sum is 32.

The square root of 697091 is about 834.9197566234. The cubic root of 697091 is about 88.6672335565.

The spelling of 697091 in words is "six hundred ninety-seven thousand, ninety-one".