40131109 has 2 divisors, whose sum is σ = 40131110. Its totient is φ = 40131108.

The previous prime is 40131071. The next prime is 40131121. The reversal of 40131109 is 90113104.

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., 39564100 + 567009 = 6290^2 + 753^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-40131109 is a prime.

It is a super-2 number, since 2×40131109² = 3221011819139762, which contains 22 as substring.

It is equal to p_2441152 and since 40131109 and 2441152 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (40131149) 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, 20065554 + 20065555.

It is an arithmetic number, because the mean of its divisors is an integer number (20065555).

Almost surely, 2^40131109 is an apocalyptic number.

It is an amenable number.

40131109 is a deficient number, since it is larger than the sum of its proper divisors (1).

40131109 is an equidigital number, since it uses as much as digits as its factorization.

40131109 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 108, while the sum is 19.

The square root of 40131109 is about 6334.9119173040. The cubic root of 40131109 is about 342.3684372246.

The spelling of 40131109 in words is "forty million, one hundred thirty-one thousand, one hundred nine".