40427609 has 2 divisors, whose sum is σ = 40427610. Its totient is φ = 40427608.

The previous prime is 40427593. The next prime is 40427623. The reversal of 40427609 is 90672404.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 24403600 + 16024009 = 4940^2 + 4003^2 .

It is a cyclic number.

It is not a de Polignac number, because 40427609 - 2⁴ = 40427593 is a prime.

It is not a weakly prime, because it can be changed into another prime (40427659) 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, 20213804 + 20213805.

It is an arithmetic number, because the mean of its divisors is an integer number (20213805).

Almost surely, 2^40427609 is an apocalyptic number.

It is an amenable number.

40427609 is a deficient number, since it is larger than the sum of its proper divisors (1).

40427609 is an equidigital number, since it uses as much as digits as its factorization.

40427609 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 12096, while the sum is 32.

The square root of 40427609 is about 6358.2709127561. The cubic root of 40427609 is about 343.2095408379.

The spelling of 40427609 in words is "forty million, four hundred twenty-seven thousand, six hundred nine".