100642819 has 2 divisors, whose sum is σ = 100642820. Its totient is φ = 100642818.

The previous prime is 100642793. The next prime is 100642831. The reversal of 100642819 is 918246001.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 100642819 - 2⁹ = 100642307 is a prime.

It is a super-2 number, since 2×100642819² = 20257954032533522, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (100642879) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50321409 + 50321410.

It is an arithmetic number, because the mean of its divisors is an integer number (50321410).

Almost surely, 2^100642819 is an apocalyptic number.

100642819 is a deficient number, since it is larger than the sum of its proper divisors (1).

100642819 is an equidigital number, since it uses as much as digits as its factorization.

100642819 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3456, while the sum is 31.

The square root of 100642819 is about 10032.0894633172. The cubic root of 100642819 is about 465.1513270146.

The spelling of 100642819 in words is "one hundred million, six hundred forty-two thousand, eight hundred nineteen".