100641387 has 24 divisors (see below), whose sum is σ = 168571648. Its totient is φ = 52279920.

The previous prime is 100641383. The next prime is 100641389. The reversal of 100641387 is 783146001.

It is a happy number.

It is not a de Polignac number, because 100641387 - 2² = 100641383 is a prime.

It is not an unprimeable number, because it can be changed into a prime (100641383) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 17263 + ... + 22344.

Almost surely, 2^100641387 is an apocalyptic number.

100641387 is a deficient number, since it is larger than the sum of its proper divisors (67930261).

100641387 is a wasteful number, since it uses less digits than its factorization.

100641387 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39639 (or 39628 counting only the distinct ones).

The product of its (nonzero) digits is 4032, while the sum is 30.

The square root of 100641387 is about 10032.0180920889. The cubic root of 100641387 is about 465.1491208633.

Adding to 100641387 its reverse (783146001), we get a palindrome (883787388).

The spelling of 100641387 in words is "one hundred million, six hundred forty-one thousand, three hundred eighty-seven".