38070209 has 2 divisors, whose sum is σ = 38070210. Its totient is φ = 38070208.

The previous prime is 38070203. The next prime is 38070211. The reversal of 38070209 is 90207083.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 37945600 + 124609 = 6160^2 + 353^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-38070209 is a prime.

Together with 38070211, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (38070203) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19035104 + 19035105.

It is an arithmetic number, because the mean of its divisors is an integer number (19035105).

Almost surely, 2^38070209 is an apocalyptic number.

It is an amenable number.

38070209 is a deficient number, since it is larger than the sum of its proper divisors (1).

38070209 is an equidigital number, since it uses as much as digits as its factorization.

38070209 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3024, while the sum is 29.

The square root of 38070209 is about 6170.1060768839. The cubic root of 38070209 is about 336.4044667415.

The spelling of 38070209 in words is "thirty-eight million, seventy thousand, two hundred nine".