40100609 has 2 divisors, whose sum is σ = 40100610. Its totient is φ = 40100608.

The previous prime is 40100597. The next prime is 40100611. The reversal of 40100609 is 90600104.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 36566209 + 3534400 = 6047^2 + 1880^2 .

It is a cyclic number.

It is not a de Polignac number, because 40100609 - 2¹² = 40096513 is a prime.

Together with 40100611, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (40100629) 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, 20050304 + 20050305.

It is an arithmetic number, because the mean of its divisors is an integer number (20050305).

Almost surely, 2^40100609 is an apocalyptic number.

It is an amenable number.

40100609 is a deficient number, since it is larger than the sum of its proper divisors (1).

40100609 is an equidigital number, since it uses as much as digits as its factorization.

40100609 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 216, while the sum is 20.

The square root of 40100609 is about 6332.5041650203. The cubic root of 40100609 is about 342.2816808892.

The spelling of 40100609 in words is "forty million, one hundred thousand, six hundred nine".