697090 has 8 divisors (see below), whose sum is σ = 1254780. Its totient is φ = 278832.

The previous prime is 697087. The next prime is 697093. The reversal of 697090 is 90796.

It is an interprime number because it is at equal distance from previous prime (697087) and next prime (697093).

It can be written as a sum of positive squares in 2 ways, for example, as 582169 + 114921 = 763^2 + 339^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

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

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 34845 + ... + 34864.

2⁶⁹⁷⁰⁹⁰ is an apocalyptic number.

697090 is a deficient number, since it is larger than the sum of its proper divisors (557690).

697090 is a wasteful number, since it uses less digits than its factorization.

697090 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 69716.

The product of its (nonzero) digits is 3402, while the sum is 31.

The square root of 697090 is about 834.9191577632. The cubic root of 697090 is about 88.6671911578.

The spelling of 697090 in words is "six hundred ninety-seven thousand, ninety".