38381899 has 2 divisors, whose sum is σ = 38381900. Its totient is φ = 38381898.

The previous prime is 38381891. The next prime is 38381909. The reversal of 38381899 is 99818383.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 38381899 - 2³ = 38381891 is a prime.

It is not a weakly prime, because it can be changed into another prime (38381891) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19190949 + 19190950.

It is an arithmetic number, because the mean of its divisors is an integer number (19190950).

Almost surely, 2^38381899 is an apocalyptic number.

38381899 is a deficient number, since it is larger than the sum of its proper divisors (1).

38381899 is an equidigital number, since it uses as much as digits as its factorization.

38381899 is an evil number, because the sum of its binary digits is even.

The product of its digits is 373248, while the sum is 49.

The square root of 38381899 is about 6195.3126636192. The cubic root of 38381899 is about 337.3200474604.

The spelling of 38381899 in words is "thirty-eight million, three hundred eighty-one thousand, eight hundred ninety-nine".