38903787889 has 2 divisors, whose sum is σ = 38903787890. Its totient is φ = 38903787888.

The previous prime is 38903787833. The next prime is 38903787893. The reversal of 38903787889 is 98878730983.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 38850381025 + 53406864 = 197105^2 + 7308^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-38903787889 is a prime.

It is a super-2 number, since 2×38903787889² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (38903887889) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19451893944 + 19451893945.

It is an arithmetic number, because the mean of its divisors is an integer number (19451893945).

Almost surely, 2^38903787889 is an apocalyptic number.

It is an amenable number.

38903787889 is a deficient number, since it is larger than the sum of its proper divisors (1).

38903787889 is an equidigital number, since it uses as much as digits as its factorization.

38903787889 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 146313216, while the sum is 70.

The spelling of 38903787889 in words is "thirty-eight billion, nine hundred three million, seven hundred eighty-seven thousand, eight hundred eighty-nine".