38413909 has 2 divisors, whose sum is σ = 38413910. Its totient is φ = 38413908.

The previous prime is 38413891. The next prime is 38413919. The reversal of 38413909 is 90931483.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 32148900 + 6265009 = 5670^2 + 2503^2 .

It is a cyclic number.

It is not a de Polignac number, because 38413909 - 2¹¹ = 38411861 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (38413919) 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, 19206954 + 19206955.

It is an arithmetic number, because the mean of its divisors is an integer number (19206955).

Almost surely, 2^38413909 is an apocalyptic number.

It is an amenable number.

38413909 is a deficient number, since it is larger than the sum of its proper divisors (1).

38413909 is an equidigital number, since it uses as much as digits as its factorization.

38413909 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 23328, while the sum is 37.

The square root of 38413909 is about 6197.8955299359. The cubic root of 38413909 is about 337.4137949013.

It can be divided in two parts, 3841 and 3909, that added together give a triangular number (7750 = T₁₂₄).

The spelling of 38413909 in words is "thirty-eight million, four hundred thirteen thousand, nine hundred nine".