77341909 has 2 divisors, whose sum is σ = 77341910. Its totient is φ = 77341908.

The previous prime is 77341903. The next prime is 77341921. The reversal of 77341909 is 90914377.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 40678884 + 36663025 = 6378^2 + 6055^2 .

It is a cyclic number.

It is not a de Polignac number, because 77341909 - 2¹⁹ = 76817621 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 (77341903) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 38670954 + 38670955.

It is an arithmetic number, because the mean of its divisors is an integer number (38670955).

Almost surely, 2^77341909 is an apocalyptic number.

It is an amenable number.

77341909 is a deficient number, since it is larger than the sum of its proper divisors (1).

77341909 is an equidigital number, since it uses as much as digits as its factorization.

77341909 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 47628, while the sum is 40.

The square root of 77341909 is about 8794.4248817077. The cubic root of 77341909 is about 426.0608496766.

The spelling of 77341909 in words is "seventy-seven million, three hundred forty-one thousand, nine hundred nine".