100381559 has 2 divisors, whose sum is σ = 100381560. Its totient is φ = 100381558.

The previous prime is 100381553. The next prime is 100381607. The reversal of 100381559 is 955183001.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 100381559 - 2¹² = 100377463 is a prime.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (100381553) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50190779 + 50190780.

It is an arithmetic number, because the mean of its divisors is an integer number (50190780).

Almost surely, 2^100381559 is an apocalyptic number.

100381559 is a deficient number, since it is larger than the sum of its proper divisors (1).

100381559 is an equidigital number, since it uses as much as digits as its factorization.

100381559 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5400, while the sum is 32.

The square root of 100381559 is about 10019.0597862274. The cubic root of 100381559 is about 464.7484807732.

The spelling of 100381559 in words is "one hundred million, three hundred eighty-one thousand, five hundred fifty-nine".