684264577 has 2 divisors, whose sum is σ = 684264578. Its totient is φ = 684264576.

The previous prime is 684264571. The next prime is 684264593. The reversal of 684264577 is 775462486.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 384316816 + 299947761 = 19604^2 + 17319^2 .

It is a cyclic number.

It is not a de Polignac number, because 684264577 - 2²³ = 675875969 is a prime.

It is a super-2 number, since 2×684264577² = 936436022673977858, which contains 22 as substring.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 684264577.

It is not a weakly prime, because it can be changed into another prime (684264571) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 342132288 + 342132289.

It is an arithmetic number, because the mean of its divisors is an integer number (342132289).

Almost surely, 2^684264577 is an apocalyptic number.

It is an amenable number.

684264577 is a deficient number, since it is larger than the sum of its proper divisors (1).

684264577 is an equidigital number, since it uses as much as digits as its factorization.

684264577 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2257920, while the sum is 49.

The square root of 684264577 is about 26158.4513494205. The cubic root of 684264577 is about 881.2004007965.

The spelling of 684264577 in words is "six hundred eighty-four million, two hundred sixty-four thousand, five hundred seventy-seven".