677442793 has 2 divisors, whose sum is σ = 677442794. Its totient is φ = 677442792.

The previous prime is 677442791. The next prime is 677442803. The reversal of 677442793 is 397244776.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 420578064 + 256864729 = 20508^2 + 16027^2 .

It is a cyclic number.

It is not a de Polignac number, because 677442793 - 2¹ = 677442791 is a prime.

Together with 677442791, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (677442791) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 338721396 + 338721397.

It is an arithmetic number, because the mean of its divisors is an integer number (338721397).

Almost surely, 2^677442793 is an apocalyptic number.

It is an amenable number.

677442793 is a deficient number, since it is larger than the sum of its proper divisors (1).

677442793 is an equidigital number, since it uses as much as digits as its factorization.

677442793 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1778112, while the sum is 49.

The square root of 677442793 is about 26027.7312303627. The cubic root of 677442793 is about 878.2622356707.

The spelling of 677442793 in words is "six hundred seventy-seven million, four hundred forty-two thousand, seven hundred ninety-three".