900045439 has 4 divisors (see below), whose sum is σ = 900237256. Its totient is φ = 899853624.

The previous prime is 900045431. The next prime is 900045451. The reversal of 900045439 is 934540009.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 934540009 = 13 ⋅71887693.

It is a cyclic number.

It is not a de Polignac number, because 900045439 - 2³ = 900045431 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (900045431) 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, 88689 + ... + 98314.

It is an arithmetic number, because the mean of its divisors is an integer number (225059314).

Almost surely, 2^900045439 is an apocalyptic number.

900045439 is a deficient number, since it is larger than the sum of its proper divisors (191817).

900045439 is a wasteful number, since it uses less digits than its factorization.

900045439 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 191816.

The product of its (nonzero) digits is 19440, while the sum is 34.

The square root of 900045439 is about 30000.7573071081. The cubic root of 900045439 is about 965.5056328034.

The spelling of 900045439 in words is "nine hundred million, forty-five thousand, four hundred thirty-nine".