42207993 has 8 divisors (see below), whose sum is σ = 62530400. Its totient is φ = 28138644.

The previous prime is 42207959. The next prime is 42208003. The reversal of 42207993 is 39970224.

It is not a de Polignac number, because 42207993 - 2⁶ = 42207929 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (42207593) 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 7 ways as a sum of consecutive naturals, for example, 781603 + ... + 781656.

It is an arithmetic number, because the mean of its divisors is an integer number (7816300).

Almost surely, 2^42207993 is an apocalyptic number.

It is an amenable number.

42207993 is a deficient number, since it is larger than the sum of its proper divisors (20322407).

42207993 is a wasteful number, since it uses less digits than its factorization.

42207993 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1563268 (or 1563262 counting only the distinct ones).

The product of its (nonzero) digits is 27216, while the sum is 36.

The square root of 42207993 is about 6496.7678887274. The cubic root of 42207993 is about 348.1755208512.

The spelling of 42207993 in words is "forty-two million, two hundred seven thousand, nine hundred ninety-three".