38618243 has 2 divisors, whose sum is σ = 38618244. Its totient is φ = 38618242.

The previous prime is 38618233. The next prime is 38618263. The reversal of 38618243 is 34281683.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 38618243 - 2²⁰ = 37569667 is a prime.

It is not a weakly prime, because it can be changed into another prime (38618213) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19309121 + 19309122.

It is an arithmetic number, because the mean of its divisors is an integer number (19309122).

Almost surely, 2^38618243 is an apocalyptic number.

38618243 is a deficient number, since it is larger than the sum of its proper divisors (1).

38618243 is an equidigital number, since it uses as much as digits as its factorization.

38618243 is an evil number, because the sum of its binary digits is even.

The product of its digits is 27648, while the sum is 35.

The square root of 38618243 is about 6214.3578107476. The cubic root of 38618243 is about 338.0110024079.

The spelling of 38618243 in words is "thirty-eight million, six hundred eighteen thousand, two hundred forty-three".