38188009 has 2 divisors, whose sum is σ = 38188010. Its totient is φ = 38188008.

The previous prime is 38187997. The next prime is 38188019. The reversal of 38188009 is 90088183.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 26491609 + 11696400 = 5147^2 + 3420^2 .

It is a cyclic number.

It is not a de Polignac number, because 38188009 - 2⁵ = 38187977 is a prime.

It is not a weakly prime, because it can be changed into another prime (38188019) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19094004 + 19094005.

It is an arithmetic number, because the mean of its divisors is an integer number (19094005).

Almost surely, 2^38188009 is an apocalyptic number.

It is an amenable number.

38188009 is a deficient number, since it is larger than the sum of its proper divisors (1).

38188009 is an equidigital number, since it uses as much as digits as its factorization.

38188009 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 13824, while the sum is 37.

The square root of 38188009 is about 6179.6447308887. The cubic root of 38188009 is about 336.7510863466.

The spelling of 38188009 in words is "thirty-eight million, one hundred eighty-eight thousand, nine".