77673389 has 2 divisors, whose sum is σ = 77673390. Its totient is φ = 77673388.

The previous prime is 77673373. The next prime is 77673413. The reversal of 77673389 is 98337677.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 71961289 + 5712100 = 8483^2 + 2390^2 .

It is a cyclic number.

It is not a de Polignac number, because 77673389 - 2⁴ = 77673373 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (77673329) 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, 38836694 + 38836695.

It is an arithmetic number, because the mean of its divisors is an integer number (38836695).

Almost surely, 2^77673389 is an apocalyptic number.

It is an amenable number.

77673389 is a deficient number, since it is larger than the sum of its proper divisors (1).

77673389 is an equidigital number, since it uses as much as digits as its factorization.

77673389 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1333584, while the sum is 50.

The square root of 77673389 is about 8813.2507623464. The cubic root of 77673389 is about 426.6686674575.

The spelling of 77673389 in words is "seventy-seven million, six hundred seventy-three thousand, three hundred eighty-nine".