40399033949 has 2 divisors, whose sum is σ = 40399033950. Its totient is φ = 40399033948.

The previous prime is 40399033891. The next prime is 40399033981. The reversal of 40399033949 is 94933099304.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 35988745849 + 4410288100 = 189707^2 + 66410^2 .

It is a cyclic number.

It is not a de Polignac number, because 40399033949 - 2⁸ = 40399033693 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 40399033949.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (40399033049) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20199516974 + 20199516975.

It is an arithmetic number, because the mean of its divisors is an integer number (20199516975).

Almost surely, 2^40399033949 is an apocalyptic number.

It is an amenable number.

40399033949 is a deficient number, since it is larger than the sum of its proper divisors (1).

40399033949 is an equidigital number, since it uses as much as digits as its factorization.

40399033949 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2834352, while the sum is 53.

The spelling of 40399033949 in words is "forty billion, three hundred ninety-nine million, thirty-three thousand, nine hundred forty-nine".