38948478187 has 2 divisors, whose sum is σ = 38948478188. Its totient is φ = 38948478186.

The previous prime is 38948478143. The next prime is 38948478211. The reversal of 38948478187 is 78187484983.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-38948478187 is a prime.

It is not a weakly prime, because it can be changed into another prime (38948478587) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19474239093 + 19474239094.

It is an arithmetic number, because the mean of its divisors is an integer number (19474239094).

Almost surely, 2^38948478187 is an apocalyptic number.

38948478187 is a deficient number, since it is larger than the sum of its proper divisors (1).

38948478187 is an equidigital number, since it uses as much as digits as its factorization.

38948478187 is an evil number, because the sum of its binary digits is even.

The product of its digits is 86704128, while the sum is 67.

The spelling of 38948478187 in words is "thirty-eight billion, nine hundred forty-eight million, four hundred seventy-eight thousand, one hundred eighty-seven".