677961749 has 2 divisors, whose sum is σ = 677961750. Its totient is φ = 677961748.

The previous prime is 677961727. The next prime is 677961769. The reversal of 677961749 is 947169776.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 539075524 + 138886225 = 23218^2 + 11785^2 .

It is a cyclic number.

It is not a de Polignac number, because 677961749 - 2¹⁶ = 677896213 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 677961694 and 677961703.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (677961769) 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 as a sum of consecutive naturals, namely, 338980874 + 338980875.

It is an arithmetic number, because the mean of its divisors is an integer number (338980875).

Almost surely, 2^677961749 is an apocalyptic number.

It is an amenable number.

677961749 is a deficient number, since it is larger than the sum of its proper divisors (1).

677961749 is an equidigital number, since it uses as much as digits as its factorization.

677961749 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4000752, while the sum is 56.

The square root of 677961749 is about 26037.6986118205. The cubic root of 677961749 is about 878.4864431007.

The spelling of 677961749 in words is "six hundred seventy-seven million, nine hundred sixty-one thousand, seven hundred forty-nine".