104777905 has 8 divisors (see below), whose sum is σ = 126978984. Its totient is φ = 82992000.

The previous prime is 104777863. The next prime is 104777909. The reversal of 104777905 is 509777401.

It can be written as a sum of positive squares in 4 ways, for example, as 18974736 + 85803169 = 4356^2 + 9263^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 104777905 - 2¹⁷ = 104646833 is a prime.

It is a Duffinian number.

It is a nialpdrome in base 14.

It is not an unprimeable number, because it can be changed into a prime (104777909) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 103236 + ... + 104245.

It is an arithmetic number, because the mean of its divisors is an integer number (15872373).

Almost surely, 2^104777905 is an apocalyptic number.

It is an amenable number.

104777905 is a deficient number, since it is larger than the sum of its proper divisors (22201079).

104777905 is a wasteful number, since it uses less digits than its factorization.

104777905 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 207587.

The product of its (nonzero) digits is 61740, while the sum is 40.

The square root of 104777905 is about 10236.1079029092. The cubic root of 104777905 is about 471.4365358530.

The spelling of 104777905 in words is "one hundred four million, seven hundred seventy-seven thousand, nine hundred five".