104777909 has 2 divisors, whose sum is σ = 104777910. Its totient is φ = 104777908.

The previous prime is 104777863. The next prime is 104777977. The reversal of 104777909 is 909777401.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 78818884 + 25959025 = 8878^2 + 5095^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-104777909 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 104777909.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (104777999) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 52388954 + 52388955.

It is an arithmetic number, because the mean of its divisors is an integer number (52388955).

Almost surely, 2^104777909 is an apocalyptic number.

It is an amenable number.

104777909 is a deficient number, since it is larger than the sum of its proper divisors (1).

104777909 is an equidigital number, since it uses as much as digits as its factorization.

104777909 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 111132, while the sum is 44.

The square root of 104777909 is about 10236.1080982960. The cubic root of 104777909 is about 471.4365418522.

The spelling of 104777909 in words is "one hundred four million, seven hundred seventy-seven thousand, nine hundred nine".