900950905 has 4 divisors (see below), whose sum is σ = 1081141092. Its totient is φ = 720760720.

The previous prime is 900950903. The next prime is 900950909. The reversal of 900950905 is 509059009.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 509059009 = 691 ⋅736699.

It can be written as a sum of positive squares in 2 ways, for example, as 515653264 + 385297641 = 22708^2 + 19629^2 .

It is not a de Polignac number, because 900950905 - 2¹ = 900950903 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (900950903) 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 in 3 ways as a sum of consecutive naturals, for example, 90095086 + ... + 90095095.

It is an arithmetic number, because the mean of its divisors is an integer number (270285273).

Almost surely, 2^900950905 is an apocalyptic number.

It is an amenable number.

900950905 is a deficient number, since it is larger than the sum of its proper divisors (180190187).

900950905 is a wasteful number, since it uses less digits than its factorization.

900950905 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 180190186.

The product of its (nonzero) digits is 18225, while the sum is 37.

The square root of 900950905 is about 30015.8442326715. The cubic root of 900950905 is about 965.8292977664.

The spelling of 900950905 in words is "nine hundred million, nine hundred fifty thousand, nine hundred five".