100621867 has 4 divisors (see below), whose sum is σ = 101512440. Its totient is φ = 99731296.

The previous prime is 100621819. The next prime is 100621903. The reversal of 100621867 is 768126001.

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 100621867 - 2¹¹ = 100619819 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (100621267) 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 3 ways as a sum of consecutive naturals, for example, 445117 + ... + 445342.

It is an arithmetic number, because the mean of its divisors is an integer number (25378110).

Almost surely, 2^100621867 is an apocalyptic number.

100621867 is a deficient number, since it is larger than the sum of its proper divisors (890573).

100621867 is an equidigital number, since it uses as much as digits as its factorization.

100621867 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 890572.

The product of its (nonzero) digits is 4032, while the sum is 31.

The square root of 100621867 is about 10031.0451599023. The cubic root of 100621867 is about 465.1190460992.

Adding to 100621867 its reverse (768126001), we get a palindrome (868747868).

The spelling of 100621867 in words is "one hundred million, six hundred twenty-one thousand, eight hundred sixty-seven".