38409257 has 2 divisors, whose sum is σ = 38409258. Its totient is φ = 38409256.

The previous prime is 38409229. The next prime is 38409263. The reversal of 38409257 is 75290483.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 26822041 + 11587216 = 5179^2 + 3404^2 .

It is a cyclic number.

It is not a de Polignac number, because 38409257 - 2⁶ = 38409193 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 38409257.

It is not a weakly prime, because it can be changed into another prime (38409757) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19204628 + 19204629.

It is an arithmetic number, because the mean of its divisors is an integer number (19204629).

Almost surely, 2^38409257 is an apocalyptic number.

It is an amenable number.

38409257 is a deficient number, since it is larger than the sum of its proper divisors (1).

38409257 is an equidigital number, since it uses as much as digits as its factorization.

38409257 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 60480, while the sum is 38.

The square root of 38409257 is about 6197.5202298984. The cubic root of 38409257 is about 337.4001738599.

The spelling of 38409257 in words is "thirty-eight million, four hundred nine thousand, two hundred fifty-seven".