38920229 has 2 divisors, whose sum is σ = 38920230. Its totient is φ = 38920228.

The previous prime is 38920213. The next prime is 38920241. The reversal of 38920229 is 92202983.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 24304900 + 14615329 = 4930^2 + 3823^2 .

It is an emirp because it is prime and its reverse (92202983) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 38920229 - 2⁴ = 38920213 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (38920129) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19460114 + 19460115.

It is an arithmetic number, because the mean of its divisors is an integer number (19460115).

Almost surely, 2^38920229 is an apocalyptic number.

It is an amenable number.

38920229 is a deficient number, since it is larger than the sum of its proper divisors (1).

38920229 is an equidigital number, since it uses as much as digits as its factorization.

38920229 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 15552, while the sum is 35.

The square root of 38920229 is about 6238.6079376733. The cubic root of 38920229 is about 338.8897725240.

The spelling of 38920229 in words is "thirty-eight million, nine hundred twenty thousand, two hundred twenty-nine".