100561147 has 2 divisors, whose sum is σ = 100561148. Its totient is φ = 100561146.

The previous prime is 100561099. The next prime is 100561177. The reversal of 100561147 is 741165001.

It is a happy number.

It is a strong prime.

It is an emirp because it is prime and its reverse (741165001) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 100561147 - 2¹¹ = 100559099 is a prime.

It is a super-2 number, since 2×100561147² = 20225088571911218, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (100561177) 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 as a sum of consecutive naturals, namely, 50280573 + 50280574.

It is an arithmetic number, because the mean of its divisors is an integer number (50280574).

Almost surely, 2^100561147 is an apocalyptic number.

100561147 is a deficient number, since it is larger than the sum of its proper divisors (1).

100561147 is an equidigital number, since it uses as much as digits as its factorization.

100561147 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 840, while the sum is 25.

The square root of 100561147 is about 10028.0180993056. The cubic root of 100561147 is about 465.0254689869.

The spelling of 100561147 in words is "one hundred million, five hundred sixty-one thousand, one hundred forty-seven".