40243759 has 2 divisors, whose sum is σ = 40243760. Its totient is φ = 40243758.

The previous prime is 40243739. The next prime is 40243769. The reversal of 40243759 is 95734204.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 40243759 - 2⁷ = 40243631 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (40243739) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20121879 + 20121880.

It is an arithmetic number, because the mean of its divisors is an integer number (20121880).

Almost surely, 2^40243759 is an apocalyptic number.

40243759 is a deficient number, since it is larger than the sum of its proper divisors (1).

40243759 is an equidigital number, since it uses as much as digits as its factorization.

40243759 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 30240, while the sum is 34.

The square root of 40243759 is about 6343.7968914523. The cubic root of 40243759 is about 342.6884863032.

The spelling of 40243759 in words is "forty million, two hundred forty-three thousand, seven hundred fifty-nine".