40939783 has 2 divisors, whose sum is σ = 40939784. Its totient is φ = 40939782.

The previous prime is 40939781. The next prime is 40939799. The reversal of 40939783 is 38793904.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 40939783 - 2¹ = 40939781 is a prime.

Together with 40939781, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (40939781) 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 as a sum of consecutive naturals, namely, 20469891 + 20469892.

It is an arithmetic number, because the mean of its divisors is an integer number (20469892).

Almost surely, 2^40939783 is an apocalyptic number.

40939783 is a deficient number, since it is larger than the sum of its proper divisors (1).

40939783 is an equidigital number, since it uses as much as digits as its factorization.

40939783 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 163296, while the sum is 43.

The square root of 40939783 is about 6398.4203519306. The cubic root of 40939783 is about 344.6528272616.

The spelling of 40939783 in words is "forty million, nine hundred thirty-nine thousand, seven hundred eighty-three".