40140539 has 2 divisors, whose sum is σ = 40140540. Its totient is φ = 40140538.

The previous prime is 40140511. The next prime is 40140601. The reversal of 40140539 is 93504104.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 40140539 - 2⁸ = 40140283 is a prime.

It is a super-2 number, since 2×40140539² = 3222525742421042, which contains 22 as substring.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (40100539) 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, 20070269 + 20070270.

It is an arithmetic number, because the mean of its divisors is an integer number (20070270).

Almost surely, 2^40140539 is an apocalyptic number.

40140539 is a deficient number, since it is larger than the sum of its proper divisors (1).

40140539 is an equidigital number, since it uses as much as digits as its factorization.

40140539 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2160, while the sum is 26.

The square root of 40140539 is about 6335.6561617563. The cubic root of 40140539 is about 342.3952516801.

The spelling of 40140539 in words is "forty million, one hundred forty thousand, five hundred thirty-nine".