40951909 has 2 divisors, whose sum is σ = 40951910. Its totient is φ = 40951908.

The previous prime is 40951901. The next prime is 40951913. The reversal of 40951909 is 90915904.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 23961025 + 16990884 = 4895^2 + 4122^2 .

It is a cyclic number.

It is not a de Polignac number, because 40951909 - 2³ = 40951901 is a prime.

It is a super-3 number, since 3×40951909³ (a number of 24 digits) contains 333 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (40951901) 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, 20475954 + 20475955.

It is an arithmetic number, because the mean of its divisors is an integer number (20475955).

Almost surely, 2^40951909 is an apocalyptic number.

It is an amenable number.

40951909 is a deficient number, since it is larger than the sum of its proper divisors (1).

40951909 is an equidigital number, since it uses as much as digits as its factorization.

40951909 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 14580, while the sum is 37.

The square root of 40951909 is about 6399.3678594061. The cubic root of 40951909 is about 344.6868516043.

The spelling of 40951909 in words is "forty million, nine hundred fifty-one thousand, nine hundred nine".