40312529 has 2 divisors, whose sum is σ = 40312530. Its totient is φ = 40312528.

The previous prime is 40312513. The next prime is 40312549. The reversal of 40312529 is 92521304.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 39753025 + 559504 = 6305^2 + 748^2 .

It is a cyclic number.

It is not a de Polignac number, because 40312529 - 2⁴ = 40312513 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 40312498 and 40312507.

It is not a weakly prime, because it can be changed into another prime (40312549) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20156264 + 20156265.

It is an arithmetic number, because the mean of its divisors is an integer number (20156265).

Almost surely, 2^40312529 is an apocalyptic number.

It is an amenable number.

40312529 is a deficient number, since it is larger than the sum of its proper divisors (1).

40312529 is an equidigital number, since it uses as much as digits as its factorization.

40312529 is an evil number, because the sum of its binary digits is even.

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

The square root of 40312529 is about 6349.2148333475. The cubic root of 40312529 is about 342.8835747397.

The spelling of 40312529 in words is "forty million, three hundred twelve thousand, five hundred twenty-nine".