40731287 has 2 divisors, whose sum is σ = 40731288. Its totient is φ = 40731286.

The previous prime is 40731239. The next prime is 40731311. The reversal of 40731287 is 78213704.

It is a happy number.

40731287 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 40731287 - 2¹² = 40727191 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 (40731217) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20365643 + 20365644.

It is an arithmetic number, because the mean of its divisors is an integer number (20365644).

Almost surely, 2^40731287 is an apocalyptic number.

40731287 is a deficient number, since it is larger than the sum of its proper divisors (1).

40731287 is an equidigital number, since it uses as much as digits as its factorization.

40731287 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 9408, while the sum is 32.

The square root of 40731287 is about 6382.1067838136. The cubic root of 40731287 is about 344.0667545546.

The spelling of 40731287 in words is "forty million, seven hundred thirty-one thousand, two hundred eighty-seven".