40253687 has 2 divisors, whose sum is σ = 40253688. Its totient is φ = 40253686.

The previous prime is 40253627. The next prime is 40253693. The reversal of 40253687 is 78635204.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 40253687 - 2²⁴ = 23476471 is a prime.

It is a super-3 number, since 3×40253687³ (a number of 24 digits) contains 333 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (40253617) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20126843 + 20126844.

It is an arithmetic number, because the mean of its divisors is an integer number (20126844).

Almost surely, 2^40253687 is an apocalyptic number.

40253687 is a deficient number, since it is larger than the sum of its proper divisors (1).

40253687 is an equidigital number, since it uses as much as digits as its factorization.

40253687 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 40320, while the sum is 35.

The square root of 40253687 is about 6344.5793398775. The cubic root of 40253687 is about 342.7166640186.

The spelling of 40253687 in words is "forty million, two hundred fifty-three thousand, six hundred eighty-seven".