682720897 has 2 divisors, whose sum is σ = 682720898. Its totient is φ = 682720896.

The previous prime is 682720861. The next prime is 682720903. The reversal of 682720897 is 798027286.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 529184016 + 153536881 = 23004^2 + 12391^2 .

It is a cyclic number.

It is not a de Polignac number, because 682720897 - 2¹⁵ = 682688129 is a prime.

It is a super-2 number, since 2×682720897² = 932215646400969218, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 682720897.

It is not a weakly prime, because it can be changed into another prime (682729897) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 341360448 + 341360449.

It is an arithmetic number, because the mean of its divisors is an integer number (341360449).

Almost surely, 2^682720897 is an apocalyptic number.

It is an amenable number.

682720897 is a deficient number, since it is larger than the sum of its proper divisors (1).

682720897 is an equidigital number, since it uses as much as digits as its factorization.

682720897 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 677376, while the sum is 49.

The square root of 682720897 is about 26128.9283553689. The cubic root of 682720897 is about 880.5372481263.

The spelling of 682720897 in words is "six hundred eighty-two million, seven hundred twenty thousand, eight hundred ninety-seven".