40505039 has 2 divisors, whose sum is σ = 40505040. Its totient is φ = 40505038.

The previous prime is 40505029. The next prime is 40505053. The reversal of 40505039 is 93050504.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 40505039 - 2²⁰ = 39456463 is a prime.

It is a super-3 number, since 3×40505039³ (a number of 24 digits) contains 333 as substring.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 40504999 and 40505017.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (40505029) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20252519 + 20252520.

It is an arithmetic number, because the mean of its divisors is an integer number (20252520).

Almost surely, 2^40505039 is an apocalyptic number.

40505039 is a deficient number, since it is larger than the sum of its proper divisors (1).

40505039 is an equidigital number, since it uses as much as digits as its factorization.

40505039 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2700, while the sum is 26.

The square root of 40505039 is about 6364.3569195953. The cubic root of 40505039 is about 343.4285146817.

The spelling of 40505039 in words is "forty million, five hundred five thousand, thirty-nine".