697898 has 4 divisors (see below), whose sum is σ = 1046850. Its totient is φ = 348948.

The previous prime is 697897. The next prime is 697909. The reversal of 697898 is 898796.

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

It can be written as a sum of positive squares in only one way, i.e., 444889 + 253009 = 667^2 + 503^2 .

It is a nialpdrome in base 15.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 697898.

It is not an unprimeable number, because it can be changed into a prime (697891) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 174473 + ... + 174476.

2⁶⁹⁷⁸⁹⁸ is an apocalyptic number.

697898 is a deficient number, since it is larger than the sum of its proper divisors (348952).

697898 is a wasteful number, since it uses less digits than its factorization.

697898 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 348951.

The product of its digits is 217728, while the sum is 47.

The square root of 697898 is about 835.4028968109. The cubic root of 697898 is about 88.7014361035.

The spelling of 697898 in words is "six hundred ninety-seven thousand, eight hundred ninety-eight".