42903917 has 8 divisors (see below), whose sum is σ = 50229312. Its totient is φ = 35877600.

The previous prime is 42903911. The next prime is 42903983. The reversal of 42903917 is 71930924.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 42903917 - 2⁸ = 42903661 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42903911) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 74459 + ... + 75032.

It is an arithmetic number, because the mean of its divisors is an integer number (6278664).

Almost surely, 2^42903917 is an apocalyptic number.

It is an amenable number.

42903917 is a deficient number, since it is larger than the sum of its proper divisors (7325395).

42903917 is a wasteful number, since it uses less digits than its factorization.

42903917 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 149539.

The product of its (nonzero) digits is 13608, while the sum is 35.

The square root of 42903917 is about 6550.1081670458. The cubic root of 42903917 is about 350.0786680311.

The spelling of 42903917 in words is "forty-two million, nine hundred three thousand, nine hundred seventeen".