38699819 has 2 divisors, whose sum is σ = 38699820. Its totient is φ = 38699818.

The previous prime is 38699813. The next prime is 38699849. The reversal of 38699819 is 91899683.

It is a weak prime.

It is an emirp because it is prime and its reverse (91899683) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-38699819 is a prime.

It is a super-2 number, since 2×38699819² = 2995351981265522, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (38699813) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19349909 + 19349910.

It is an arithmetic number, because the mean of its divisors is an integer number (19349910).

Almost surely, 2^38699819 is an apocalyptic number.

38699819 is a deficient number, since it is larger than the sum of its proper divisors (1).

38699819 is an equidigital number, since it uses as much as digits as its factorization.

38699819 is an evil number, because the sum of its binary digits is even.

The product of its digits is 839808, while the sum is 53.

The square root of 38699819 is about 6220.9178583228. The cubic root of 38699819 is about 338.2488364033.

The spelling of 38699819 in words is "thirty-eight million, six hundred ninety-nine thousand, eight hundred nineteen".