38949217 has 2 divisors, whose sum is σ = 38949218. Its totient is φ = 38949216.

The previous prime is 38949203. The next prime is 38949257. The reversal of 38949217 is 71294983.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 22619536 + 16329681 = 4756^2 + 4041^2 .

It is an emirp because it is prime and its reverse (71294983) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 38949217 - 2²³ = 30560609 is a prime.

It is not a weakly prime, because it can be changed into another prime (38949257) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19474608 + 19474609.

It is an arithmetic number, because the mean of its divisors is an integer number (19474609).

Almost surely, 2^38949217 is an apocalyptic number.

It is an amenable number.

38949217 is a deficient number, since it is larger than the sum of its proper divisors (1).

38949217 is an equidigital number, since it uses as much as digits as its factorization.

38949217 is an evil number, because the sum of its binary digits is even.

The product of its digits is 108864, while the sum is 43.

The square root of 38949217 is about 6240.9307799398. The cubic root of 38949217 is about 338.9738872981.

The spelling of 38949217 in words is "thirty-eight million, nine hundred forty-nine thousand, two hundred seventeen".