77673050309 has 2 divisors, whose sum is σ = 77673050310. Its totient is φ = 77673050308.

The previous prime is 77673050261. The next prime is 77673050369. The reversal of 77673050309 is 90305037677.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 58780547809 + 18892502500 = 242447^2 + 137450^2 .

It is a cyclic number.

It is not a de Polignac number, because 77673050309 - 2¹⁶ = 77672984773 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (77673050369) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 38836525154 + 38836525155.

It is an arithmetic number, because the mean of its divisors is an integer number (38836525155).

Almost surely, 2^77673050309 is an apocalyptic number.

It is an amenable number.

77673050309 is a deficient number, since it is larger than the sum of its proper divisors (1).

77673050309 is an equidigital number, since it uses as much as digits as its factorization.

77673050309 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 833490, while the sum is 47.

The spelling of 77673050309 in words is "seventy-seven billion, six hundred seventy-three million, fifty thousand, three hundred nine".