42903449 has 4 divisors (see below), whose sum is σ = 42963840. Its totient is φ = 42843060.

The previous prime is 42903439. The next prime is 42903451. The reversal of 42903449 is 94430924.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 42903449 - 2²⁰ = 41854873 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (42903409) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 29117 + ... + 30554.

It is an arithmetic number, because the mean of its divisors is an integer number (10740960).

Almost surely, 2^42903449 is an apocalyptic number.

It is an amenable number.

42903449 is a deficient number, since it is larger than the sum of its proper divisors (60391).

42903449 is an equidigital number, since it uses as much as digits as its factorization.

42903449 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 60390.

The product of its (nonzero) digits is 31104, while the sum is 35.

The square root of 42903449 is about 6550.0724423475. The cubic root of 42903449 is about 350.0773951293.

The spelling of 42903449 in words is "forty-two million, nine hundred three thousand, four hundred forty-nine".