38193889 has 2 divisors, whose sum is σ = 38193890. Its totient is φ = 38193888.

The previous prime is 38193863. The next prime is 38193901. The reversal of 38193889 is 98839183.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 34715664 + 3478225 = 5892^2 + 1865^2 .

It is a cyclic number.

It is not a de Polignac number, because 38193889 - 2¹¹ = 38191841 is a prime.

It is not a weakly prime, because it can be changed into another prime (38193839) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19096944 + 19096945.

It is an arithmetic number, because the mean of its divisors is an integer number (19096945).

Almost surely, 2^38193889 is an apocalyptic number.

It is an amenable number.

38193889 is a deficient number, since it is larger than the sum of its proper divisors (1).

38193889 is an equidigital number, since it uses as much as digits as its factorization.

38193889 is an evil number, because the sum of its binary digits is even.

The product of its digits is 373248, while the sum is 49.

The square root of 38193889 is about 6180.1204680815. The cubic root of 38193889 is about 336.7683692129.

The spelling of 38193889 in words is "thirty-eight million, one hundred ninety-three thousand, eight hundred eighty-nine".