38981213 has 2 divisors, whose sum is σ = 38981214. Its totient is φ = 38981212.

The previous prime is 38981183. The next prime is 38981219. The reversal of 38981213 is 31218983.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 38278969 + 702244 = 6187^2 + 838^2 .

It is a cyclic number.

It is not a de Polignac number, because 38981213 - 2⁶ = 38981149 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (38981219) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19490606 + 19490607.

It is an arithmetic number, because the mean of its divisors is an integer number (19490607).

Almost surely, 2^38981213 is an apocalyptic number.

It is an amenable number.

38981213 is a deficient number, since it is larger than the sum of its proper divisors (1).

38981213 is an equidigital number, since it uses as much as digits as its factorization.

38981213 is an evil number, because the sum of its binary digits is even.

The product of its digits is 10368, while the sum is 35.

The square root of 38981213 is about 6243.4936533963. The cubic root of 38981213 is about 339.0666819747.

It can be divided in two parts, 3898 and 1213, that multiplied together give a palindrome (4728274).

The spelling of 38981213 in words is "thirty-eight million, nine hundred eighty-one thousand, two hundred thirteen".