40185049 has 2 divisors, whose sum is σ = 40185050. Its totient is φ = 40185048.

The previous prime is 40185011. The next prime is 40185073. The reversal of 40185049 is 94058104.

It is a happy number.

40185049 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 38975049 + 1210000 = 6243^2 + 1100^2 .

It is a cyclic number.

It is not a de Polignac number, because 40185049 - 2⁹ = 40184537 is a prime.

It is a super-2 number, since 2×40185049² = 3229676326264802, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 40185049.

It is not a weakly prime, because it can be changed into another prime (40186049) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20092524 + 20092525.

It is an arithmetic number, because the mean of its divisors is an integer number (20092525).

Almost surely, 2^40185049 is an apocalyptic number.

It is an amenable number.

40185049 is a deficient number, since it is larger than the sum of its proper divisors (1).

40185049 is an equidigital number, since it uses as much as digits as its factorization.

40185049 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5760, while the sum is 31.

The square root of 40185049 is about 6339.1678475964. The cubic root of 40185049 is about 342.5217603877.

The spelling of 40185049 in words is "forty million, one hundred eighty-five thousand, forty-nine".