38997313 has 2 divisors, whose sum is σ = 38997314. Its totient is φ = 38997312.

The previous prime is 38997293. The next prime is 38997341. The reversal of 38997313 is 31379983.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 30283009 + 8714304 = 5503^2 + 2952^2 .

It is a cyclic number.

It is not a de Polignac number, because 38997313 - 2⁹ = 38996801 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 38997313.

It is not a weakly prime, because it can be changed into another prime (38997353) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19498656 + 19498657.

It is an arithmetic number, because the mean of its divisors is an integer number (19498657).

Almost surely, 2^38997313 is an apocalyptic number.

It is an amenable number.

38997313 is a deficient number, since it is larger than the sum of its proper divisors (1).

38997313 is an equidigital number, since it uses as much as digits as its factorization.

38997313 is an evil number, because the sum of its binary digits is even.

The product of its digits is 122472, while the sum is 43.

The square root of 38997313 is about 6244.7828625181. The cubic root of 38997313 is about 339.1133559301.

The spelling of 38997313 in words is "thirty-eight million, nine hundred ninety-seven thousand, three hundred thirteen".