77670223 has 2 divisors, whose sum is σ = 77670224. Its totient is φ = 77670222.

The previous prime is 77670217. The next prime is 77670251. The reversal of 77670223 is 32207677.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 77670223 - 2⁵ = 77670191 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (77670623) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 38835111 + 38835112.

It is an arithmetic number, because the mean of its divisors is an integer number (38835112).

Almost surely, 2^77670223 is an apocalyptic number.

77670223 is a deficient number, since it is larger than the sum of its proper divisors (1).

77670223 is an equidigital number, since it uses as much as digits as its factorization.

77670223 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 24696, while the sum is 34.

The square root of 77670223 is about 8813.0711446124. The cubic root of 77670223 is about 426.6628703140.

The spelling of 77670223 in words is "seventy-seven million, six hundred seventy thousand, two hundred twenty-three".