684296197 has 16 divisors (see below), whose sum is σ = 754291440. Its totient is φ = 616891392.

The previous prime is 684296159. The next prime is 684296227. The reversal of 684296197 is 791692486.

It is a happy number.

It can be written as a sum of positive squares in 8 ways, for example, as 17313921 + 666982276 = 4161^2 + 25826^2 .

It is a de Polignac number, because none of the positive numbers 2^k-684296197 is a prime.

It is a super-2 number, since 2×684296197² = 936522570457325618, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (684296147) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 155613 + ... + 159949.

It is an arithmetic number, because the mean of its divisors is an integer number (47143215).

Almost surely, 2^684296197 is an apocalyptic number.

It is an amenable number.

684296197 is a deficient number, since it is larger than the sum of its proper divisors (69995243).

684296197 is a wasteful number, since it uses less digits than its factorization.

684296197 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4632.

The product of its digits is 1306368, while the sum is 52.

The square root of 684296197 is about 26159.0557360162. The cubic root of 684296197 is about 881.2139740684.

The spelling of 684296197 in words is "six hundred eighty-four million, two hundred ninety-six thousand, one hundred ninety-seven".