42491783 has 8 divisors (see below), whose sum is σ = 43803408. Its totient is φ = 41194944.

The previous prime is 42491777. The next prime is 42491819. The reversal of 42491783 is 38719424.

42491783 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 42491783 - 2⁶ = 42491719 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 (42491083) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2285 + ... + 9497.

It is an arithmetic number, because the mean of its divisors is an integer number (5475426).

Almost surely, 2^42491783 is an apocalyptic number.

42491783 is a gapful number since it is divisible by the number (43) formed by its first and last digit.

42491783 is a deficient number, since it is larger than the sum of its proper divisors (1311625).

42491783 is a wasteful number, since it uses less digits than its factorization.

42491783 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7393.

The product of its digits is 48384, while the sum is 38.

The square root of 42491783 is about 6518.5721596067. The cubic root of 42491783 is about 348.9541103802.

The spelling of 42491783 in words is "forty-two million, four hundred ninety-one thousand, seven hundred eighty-three".