42903649 has 4 divisors (see below), whose sum is σ = 43055536. Its totient is φ = 42751764.

The previous prime is 42903647. The next prime is 42903661. The reversal of 42903649 is 94630924.

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 42903649 - 2¹ = 42903647 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (42903647) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 75519 + ... + 76084.

It is an arithmetic number, because the mean of its divisors is an integer number (10763884).

Almost surely, 2^42903649 is an apocalyptic number.

It is an amenable number.

42903649 is a deficient number, since it is larger than the sum of its proper divisors (151887).

42903649 is a wasteful number, since it uses less digits than its factorization.

42903649 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 151886.

The product of its (nonzero) digits is 46656, while the sum is 37.

The square root of 42903649 is about 6550.0877093364. The cubic root of 42903649 is about 350.0779391056.

The spelling of 42903649 in words is "forty-two million, nine hundred three thousand, six hundred forty-nine".