38517889 has 2 divisors, whose sum is σ = 38517890. Its totient is φ = 38517888.

The previous prime is 38517881. The next prime is 38517923. The reversal of 38517889 is 98871583.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 19289664 + 19228225 = 4392^2 + 4385^2 .

It is an emirp because it is prime and its reverse (98871583) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 38517889 - 2³ = 38517881 is a prime.

It is not a weakly prime, because it can be changed into another prime (38517881) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19258944 + 19258945.

It is an arithmetic number, because the mean of its divisors is an integer number (19258945).

Almost surely, 2^38517889 is an apocalyptic number.

It is an amenable number.

38517889 is a deficient number, since it is larger than the sum of its proper divisors (1).

38517889 is an equidigital number, since it uses as much as digits as its factorization.

38517889 is an evil number, because the sum of its binary digits is even.

The product of its digits is 483840, while the sum is 49.

The square root of 38517889 is about 6206.2781922824. The cubic root of 38517889 is about 337.7179614482.

The spelling of 38517889 in words is "thirty-eight million, five hundred seventeen thousand, eight hundred eighty-nine".