38913241987 has 2 divisors, whose sum is σ = 38913241988. Its totient is φ = 38913241986.

The previous prime is 38913241981. The next prime is 38913242111. The reversal of 38913241987 is 78914231983.

It is a happy number.

38913241987 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 is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-38913241987 is a prime.

It is not a weakly prime, because it can be changed into another prime (38913241981) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19456620993 + 19456620994.

It is an arithmetic number, because the mean of its divisors is an integer number (19456620994).

Almost surely, 2^38913241987 is an apocalyptic number.

38913241987 is a deficient number, since it is larger than the sum of its proper divisors (1).

38913241987 is an equidigital number, since it uses as much as digits as its factorization.

38913241987 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2612736, while the sum is 55.

It can be divided in two parts, 38913 and 241987, that added together give a square (280900 = 530²).

The spelling of 38913241987 in words is "thirty-eight billion, nine hundred thirteen million, two hundred forty-one thousand, nine hundred eighty-seven".