38987100247 has 2 divisors, whose sum is σ = 38987100248. Its totient is φ = 38987100246.

The previous prime is 38987100241. The next prime is 38987100329. The reversal of 38987100247 is 74200178983.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 38987100247 - 2¹⁹ = 38986575959 is a prime.

It is a super-2 number, since 2×38987100247² (a number of 22 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 38987100247.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (38987100241) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19493550123 + 19493550124.

It is an arithmetic number, because the mean of its divisors is an integer number (19493550124).

Almost surely, 2^38987100247 is an apocalyptic number.

38987100247 is a deficient number, since it is larger than the sum of its proper divisors (1).

38987100247 is an equidigital number, since it uses as much as digits as its factorization.

38987100247 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 677376, while the sum is 49.

The spelling of 38987100247 in words is "thirty-eight billion, nine hundred eighty-seven million, one hundred thousand, two hundred forty-seven".