100838399787 has 24 divisors (see below), whose sum is σ = 146800621968. Its totient is φ = 66697300800.

The previous prime is 100838399777. The next prime is 100838399797. The reversal of 100838399787 is 787993838001.

It is an interprime number because it is at equal distance from previous prime (100838399777) and next prime (100838399797).

It is not a de Polignac number, because 100838399787 - 2⁶ = 100838399723 is a prime.

It is not an unprimeable number, because it can be changed into a prime (100838399777) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 7988493 + ... + 8001105.

It is an arithmetic number, because the mean of its divisors is an integer number (6116692582).

Almost surely, 2^100838399787 is an apocalyptic number.

100838399787 is a deficient number, since it is larger than the sum of its proper divisors (45962222181).

100838399787 is a wasteful number, since it uses less digits than its factorization.

100838399787 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19531 (or 19528 counting only the distinct ones).

The product of its (nonzero) digits is 18289152, while the sum is 63.

The spelling of 100838399787 in words is "one hundred billion, eight hundred thirty-eight million, three hundred ninety-nine thousand, seven hundred eighty-seven".