40200109 has 2 divisors, whose sum is σ = 40200110. Its totient is φ = 40200108.

The previous prime is 40200107. The next prime is 40200133. The reversal of 40200109 is 90100204.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 36942084 + 3258025 = 6078^2 + 1805^2 .

It is a cyclic number.

It is not a de Polignac number, because 40200109 - 2¹ = 40200107 is a prime.

It is a super-2 number, since 2×40200109² = 3232097527223762, which contains 22 as substring.

Together with 40200107, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 40200092 and 40200101.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (40200103) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20100054 + 20100055.

It is an arithmetic number, because the mean of its divisors is an integer number (20100055).

Almost surely, 2^40200109 is an apocalyptic number.

It is an amenable number.

40200109 is a deficient number, since it is larger than the sum of its proper divisors (1).

40200109 is an equidigital number, since it uses as much as digits as its factorization.

40200109 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 72, while the sum is 16.

The square root of 40200109 is about 6340.3555893972. The cubic root of 40200109 is about 342.5645435752.

The spelling of 40200109 in words is "forty million, two hundred thousand, one hundred nine".