677122213 has 4 divisors (see below), whose sum is σ = 677947788. Its totient is φ = 676296640.

The previous prime is 677122211. The next prime is 677122219. The reversal of 677122213 is 312221776.

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

It can be written as a sum of positive squares in 2 ways, for example, as 504541444 + 172580769 = 22462^2 + 13137^2 .

It is a cyclic number.

It is not a de Polignac number, because 677122213 - 2¹ = 677122211 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (677122211) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 411556 + ... + 413197.

It is an arithmetic number, because the mean of its divisors is an integer number (169486947).

Almost surely, 2^677122213 is an apocalyptic number.

It is an amenable number.

677122213 is a deficient number, since it is larger than the sum of its proper divisors (825575).

677122213 is an equidigital number, since it uses as much as digits as its factorization.

677122213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 825574.

The product of its digits is 7056, while the sum is 31.

The square root of 677122213 is about 26021.5720701114. The cubic root of 677122213 is about 878.1236765016.

Adding to 677122213 its reverse (312221776), we get a palindrome (989343989).

The spelling of 677122213 in words is "six hundred seventy-seven million, one hundred twenty-two thousand, two hundred thirteen".