40257799 has 2 divisors, whose sum is σ = 40257800. Its totient is φ = 40257798.

The previous prime is 40257773. The next prime is 40257851. The reversal of 40257799 is 99775204.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 40257799 - 2¹¹ = 40255751 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (40257299) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20128899 + 20128900.

It is an arithmetic number, because the mean of its divisors is an integer number (20128900).

Almost surely, 2^40257799 is an apocalyptic number.

40257799 is a deficient number, since it is larger than the sum of its proper divisors (1).

40257799 is an equidigital number, since it uses as much as digits as its factorization.

40257799 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 158760, while the sum is 43.

The square root of 40257799 is about 6344.9033877593. The cubic root of 40257799 is about 342.7283333674.

The spelling of 40257799 in words is "forty million, two hundred fifty-seven thousand, seven hundred ninety-nine".