677947 has 2 divisors, whose sum is σ = 677948. Its totient is φ = 677946.

The previous prime is 677927. The next prime is 677953. The reversal of 677947 is 749776.

It is a happy number.

677947 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 677947 - 2¹⁵ = 645179 is a prime.

It is a super-2 number, since 2×677947² = 919224269618, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (677927) by changing a digit.

It is a good prime.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 338973 + 338974.

It is an arithmetic number, because the mean of its divisors is an integer number (338974).

2⁶⁷⁷⁹⁴⁷ is an apocalyptic number.

677947 is a deficient number, since it is larger than the sum of its proper divisors (1).

677947 is an equidigital number, since it uses as much as digits as its factorization.

677947 is an evil number, because the sum of its binary digits is even.

The product of its digits is 74088, while the sum is 40.

The square root of 677947 is about 823.3753700470. The cubic root of 677947 is about 87.8480072589.

The spelling of 677947 in words is "six hundred seventy-seven thousand, nine hundred forty-seven".