905880049 has 2 divisors, whose sum is σ = 905880050. Its totient is φ = 905880048.

The previous prime is 905880023. The next prime is 905880061. The reversal of 905880049 is 940088509.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 829440000 + 76440049 = 28800^2 + 8743^2 .

It is an emirp because it is prime and its reverse (940088509) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 905880049 - 2¹⁹ = 905355761 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 905879987 and 905880014.

It is not a weakly prime, because it can be changed into another prime (905880149) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 452940024 + 452940025.

It is an arithmetic number, because the mean of its divisors is an integer number (452940025).

Almost surely, 2^905880049 is an apocalyptic number.

It is an amenable number.

905880049 is a deficient number, since it is larger than the sum of its proper divisors (1).

905880049 is an equidigital number, since it uses as much as digits as its factorization.

905880049 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 103680, while the sum is 43.

The square root of 905880049 is about 30097.8412681043. The cubic root of 905880049 is about 967.5874608842.

The spelling of 905880049 in words is "nine hundred five million, eight hundred eighty thousand, forty-nine".