38190989 has 2 divisors, whose sum is σ = 38190990. Its totient is φ = 38190988.

The previous prime is 38190983. The next prime is 38191037. The reversal of 38190989 is 98909183.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 37002889 + 1188100 = 6083^2 + 1090^2 .

It is a cyclic number.

It is not a de Polignac number, because 38190989 - 2⁴ = 38190973 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (38190983) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19095494 + 19095495.

It is an arithmetic number, because the mean of its divisors is an integer number (19095495).

Almost surely, 2^38190989 is an apocalyptic number.

It is an amenable number.

38190989 is a deficient number, since it is larger than the sum of its proper divisors (1).

38190989 is an equidigital number, since it uses as much as digits as its factorization.

38190989 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 139968, while the sum is 47.

The square root of 38190989 is about 6179.8858403695. The cubic root of 38190989 is about 336.7598455720.

The spelling of 38190989 in words is "thirty-eight million, one hundred ninety thousand, nine hundred eighty-nine".