40039933 has 2 divisors, whose sum is σ = 40039934. Its totient is φ = 40039932.

The previous prime is 40039931. The next prime is 40039939. The reversal of 40039933 is 33993004.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 24970009 + 15069924 = 4997^2 + 3882^2 .

It is a cyclic number.

It is not a de Polignac number, because 40039933 - 2¹ = 40039931 is a prime.

Together with 40039931, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 40039895 and 40039904.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (40039931) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20019966 + 20019967.

It is an arithmetic number, because the mean of its divisors is an integer number (20019967).

Almost surely, 2^40039933 is an apocalyptic number.

It is an amenable number.

40039933 is a deficient number, since it is larger than the sum of its proper divisors (1).

40039933 is an equidigital number, since it uses as much as digits as its factorization.

40039933 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 8748, while the sum is 31.

The square root of 40039933 is about 6327.7115136517. The cubic root of 40039933 is about 342.1089589332.

The spelling of 40039933 in words is "forty million, thirty-nine thousand, nine hundred thirty-three".