38210813 has 2 divisors, whose sum is σ = 38210814. Its totient is φ = 38210812.

The previous prime is 38210801. The next prime is 38210833. The reversal of 38210813 is 31801283.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 35736484 + 2474329 = 5978^2 + 1573^2 .

It is an emirp because it is prime and its reverse (31801283) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 38210813 - 2¹⁶ = 38145277 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (38210833) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19105406 + 19105407.

It is an arithmetic number, because the mean of its divisors is an integer number (19105407).

Almost surely, 2^38210813 is an apocalyptic number.

It is an amenable number.

38210813 is a deficient number, since it is larger than the sum of its proper divisors (1).

38210813 is an equidigital number, since it uses as much as digits as its factorization.

38210813 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1152, while the sum is 26.

The square root of 38210813 is about 6181.4895454089. The cubic root of 38210813 is about 336.8181034017.

The spelling of 38210813 in words is "thirty-eight million, two hundred ten thousand, eight hundred thirteen".