100556249 has 2 divisors, whose sum is σ = 100556250. Its totient is φ = 100556248.

The previous prime is 100556191. The next prime is 100556251. The reversal of 100556249 is 942655001.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 98505625 + 2050624 = 9925^2 + 1432^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-100556249 is a prime.

It is a super-2 number, since 2×100556249² = 20223118425900002, which contains 22 as substring.

Together with 100556251, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (100556279) 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, 50278124 + 50278125.

It is an arithmetic number, because the mean of its divisors is an integer number (50278125).

Almost surely, 2^100556249 is an apocalyptic number.

It is an amenable number.

100556249 is a deficient number, since it is larger than the sum of its proper divisors (1).

100556249 is an equidigital number, since it uses as much as digits as its factorization.

100556249 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 10800, while the sum is 32.

The square root of 100556249 is about 10027.7738805779. The cubic root of 100556249 is about 465.0179189148.

The spelling of 100556249 in words is "one hundred million, five hundred fifty-six thousand, two hundred forty-nine".