40539061 has 2 divisors, whose sum is σ = 40539062. Its totient is φ = 40539060.

The previous prime is 40539053. The next prime is 40539091. The reversal of 40539061 is 16093504.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 32558436 + 7980625 = 5706^2 + 2825^2 .

It is a cyclic number.

It is not a de Polignac number, because 40539061 - 2³ = 40539053 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (40539001) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20269530 + 20269531.

It is an arithmetic number, because the mean of its divisors is an integer number (20269531).

Almost surely, 2^40539061 is an apocalyptic number.

It is an amenable number.

40539061 is a deficient number, since it is larger than the sum of its proper divisors (1).

40539061 is an equidigital number, since it uses as much as digits as its factorization.

40539061 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3240, while the sum is 28.

The square root of 40539061 is about 6367.0292130632. The cubic root of 40539061 is about 343.5246414468.

The spelling of 40539061 in words is "forty million, five hundred thirty-nine thousand, sixty-one".