38791213 has 2 divisors, whose sum is σ = 38791214. Its totient is φ = 38791212.

The previous prime is 38791201. The next prime is 38791219. The reversal of 38791213 is 31219783.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 33212169 + 5579044 = 5763^2 + 2362^2 .

It is a cyclic number.

It is not a de Polignac number, because 38791213 - 2⁹ = 38790701 is a prime.

It is a super-2 number, since 2×38791213² = 3009516412022738, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (38791219) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19395606 + 19395607.

It is an arithmetic number, because the mean of its divisors is an integer number (19395607).

Almost surely, 2^38791213 is an apocalyptic number.

It is an amenable number.

38791213 is a deficient number, since it is larger than the sum of its proper divisors (1).

38791213 is an equidigital number, since it uses as much as digits as its factorization.

38791213 is an evil number, because the sum of its binary digits is even.

The product of its digits is 9072, while the sum is 34.

The square root of 38791213 is about 6228.2592271035. The cubic root of 38791213 is about 338.5148980306.

The spelling of 38791213 in words is "thirty-eight million, seven hundred ninety-one thousand, two hundred thirteen".