38197187489 has 2 divisors, whose sum is σ = 38197187490. Its totient is φ = 38197187488.

The previous prime is 38197187467. The next prime is 38197187519. The reversal of 38197187489 is 98478179183.

38197187489 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 24521054464 + 13676133025 = 156592^2 + 116945^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-38197187489 is a prime.

It is not a weakly prime, because it can be changed into another prime (38197187989) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19098593744 + 19098593745.

It is an arithmetic number, because the mean of its divisors is an integer number (19098593745).

Almost surely, 2^38197187489 is an apocalyptic number.

It is an amenable number.

38197187489 is a deficient number, since it is larger than the sum of its proper divisors (1).

38197187489 is an equidigital number, since it uses as much as digits as its factorization.

38197187489 is an evil number, because the sum of its binary digits is even.

The product of its digits is 24385536, while the sum is 65.

The spelling of 38197187489 in words is "thirty-eight billion, one hundred ninety-seven million, one hundred eighty-seven thousand, four hundred eighty-nine".