100278049 has 2 divisors, whose sum is σ = 100278050. Its totient is φ = 100278048.

The previous prime is 100278023. The next prime is 100278077. The reversal of 100278049 is 940872001.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 94187025 + 6091024 = 9705^2 + 2468^2 .

It is a cyclic number.

It is not a de Polignac number, because 100278049 - 2¹⁵ = 100245281 is a prime.

It is a super-2 number, since 2×100278049² = 20111374222492802, which contains 22 as substring.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 100278049.

It is not a weakly prime, because it can be changed into another prime (100278649) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50139024 + 50139025.

It is an arithmetic number, because the mean of its divisors is an integer number (50139025).

Almost surely, 2^100278049 is an apocalyptic number.

It is an amenable number.

100278049 is a deficient number, since it is larger than the sum of its proper divisors (1).

100278049 is an equidigital number, since it uses as much as digits as its factorization.

100278049 is an odious number, because the sum of its binary digits is odd.

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

The square root of 100278049 is about 10013.8927995061. The cubic root of 100278049 is about 464.5886816350.

The spelling of 100278049 in words is "one hundred million, two hundred seventy-eight thousand, forty-nine".