100831487 has 4 divisors (see below), whose sum is σ = 101156016. Its totient is φ = 100506960.

The previous prime is 100831477. The next prime is 100831501. The reversal of 100831487 is 784138001.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 100831487 - 2¹⁴ = 100815103 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (100831417) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 161798 + ... + 162419.

It is an arithmetic number, because the mean of its divisors is an integer number (25289004).

Almost surely, 2^100831487 is an apocalyptic number.

100831487 is a deficient number, since it is larger than the sum of its proper divisors (324529).

100831487 is an equidigital number, since it uses as much as digits as its factorization.

100831487 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 324528.

The product of its (nonzero) digits is 5376, while the sum is 32.

The square root of 100831487 is about 10041.4882861058. The cubic root of 100831487 is about 465.4418077127.

Adding to 100831487 its reverse (784138001), we get a palindrome (884969488).

The spelling of 100831487 in words is "one hundred million, eight hundred thirty-one thousand, four hundred eighty-seven".