38821019 has 2 divisors, whose sum is σ = 38821020. Its totient is φ = 38821018.

The previous prime is 38821001. The next prime is 38821039. The reversal of 38821019 is 91012883.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-38821019 is a prime.

It is a super-2 number, since 2×38821019² = 3014143032396722, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (38821039) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19410509 + 19410510.

It is an arithmetic number, because the mean of its divisors is an integer number (19410510).

Almost surely, 2^38821019 is an apocalyptic number.

38821019 is a deficient number, since it is larger than the sum of its proper divisors (1).

38821019 is an equidigital number, since it uses as much as digits as its factorization.

38821019 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3456, while the sum is 32.

The square root of 38821019 is about 6230.6515710638. The cubic root of 38821019 is about 338.6015773853.

The spelling of 38821019 in words is "thirty-eight million, eight hundred twenty-one thousand, nineteen".