677720413 has 2 divisors, whose sum is σ = 677720414. Its totient is φ = 677720412.

The previous prime is 677720383. The next prime is 677720429. The reversal of 677720413 is 314027776.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 489427129 + 188293284 = 22123^2 + 13722^2 .

It is a cyclic number.

It is not a de Polignac number, because 677720413 - 2¹³ = 677712221 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (677720513) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 338860206 + 338860207.

It is an arithmetic number, because the mean of its divisors is an integer number (338860207).

Almost surely, 2^677720413 is an apocalyptic number.

It is an amenable number.

677720413 is a deficient number, since it is larger than the sum of its proper divisors (1).

677720413 is an equidigital number, since it uses as much as digits as its factorization.

677720413 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 49392, while the sum is 37.

The square root of 677720413 is about 26033.0638419684. The cubic root of 677720413 is about 878.3821916115.

The spelling of 677720413 in words is "six hundred seventy-seven million, seven hundred twenty thousand, four hundred thirteen".