40203949 has 2 divisors, whose sum is σ = 40203950. Its totient is φ = 40203948.

The previous prime is 40203913. The next prime is 40203967. The reversal of 40203949 is 94930204.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 33988900 + 6215049 = 5830^2 + 2493^2 .

It is a cyclic number.

It is not a de Polignac number, because 40203949 - 2¹⁵ = 40171181 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 40203949.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (40203979) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20101974 + 20101975.

It is an arithmetic number, because the mean of its divisors is an integer number (20101975).

Almost surely, 2^40203949 is an apocalyptic number.

It is an amenable number.

40203949 is a deficient number, since it is larger than the sum of its proper divisors (1).

40203949 is an equidigital number, since it uses as much as digits as its factorization.

40203949 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 7776, while the sum is 31.

The square root of 40203949 is about 6340.6584042984. The cubic root of 40203949 is about 342.5754507261.

The spelling of 40203949 in words is "forty million, two hundred three thousand, nine hundred forty-nine".