40013287 has 2 divisors, whose sum is σ = 40013288. Its totient is φ = 40013286.

The previous prime is 40013249. The next prime is 40013293. The reversal of 40013287 is 78231004.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-40013287 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (40013227) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20006643 + 20006644.

It is an arithmetic number, because the mean of its divisors is an integer number (20006644).

Almost surely, 2^40013287 is an apocalyptic number.

40013287 is a deficient number, since it is larger than the sum of its proper divisors (1).

40013287 is an equidigital number, since it uses as much as digits as its factorization.

40013287 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1344, while the sum is 25.

The square root of 40013287 is about 6325.6056627014. The cubic root of 40013287 is about 342.0330525606.

The spelling of 40013287 in words is "forty million, thirteen thousand, two hundred eighty-seven".