697690 has 16 divisors (see below), whose sum is σ = 1435392. Its totient is φ = 239184.

The previous prime is 697687. The next prime is 697691. The reversal of 697690 is 96796.

697690 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×697690² = 973542672200, which contains 22 as substring.

It is an Ulam number.

It is a zygodrome in base 4.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (697691) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4914 + ... + 5053.

It is an arithmetic number, because the mean of its divisors is an integer number (89712).

2⁶⁹⁷⁶⁹⁰ is an apocalyptic number.

697690 is an abundant number, since it is smaller than the sum of its proper divisors (737702).

It is a weird number, because it is abundant, but not a pseudoperfect number.

697690 is a wasteful number, since it uses less digits than its factorization.

697690 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9981.

The product of its (nonzero) digits is 20412, while the sum is 37.

The square root of 697690 is about 835.2783967038. The cubic root of 697690 is about 88.6926231003.

The spelling of 697690 in words is "six hundred ninety-seven thousand, six hundred ninety".