100778851 has 2 divisors, whose sum is σ = 100778852. Its totient is φ = 100778850.

The previous prime is 100778837. The next prime is 100778879. The reversal of 100778851 is 158877001.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 100778851 - 2⁷ = 100778723 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 100778851.

It is not a weakly prime, because it can be changed into another prime (100778651) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50389425 + 50389426.

It is an arithmetic number, because the mean of its divisors is an integer number (50389426).

Almost surely, 2^100778851 is an apocalyptic number.

100778851 is a deficient number, since it is larger than the sum of its proper divisors (1).

100778851 is an equidigital number, since it uses as much as digits as its factorization.

100778851 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 15680, while the sum is 37.

The square root of 100778851 is about 10038.8670177466. The cubic root of 100778851 is about 465.3608037197.

The spelling of 100778851 in words is "one hundred million, seven hundred seventy-eight thousand, eight hundred fifty-one".