100102819 has 4 divisors (see below), whose sum is σ = 100774800. Its totient is φ = 99430840.

The previous prime is 100102801. The next prime is 100102837. The reversal of 100102819 is 918201001.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 918201001 = 487 ⋅1885423.

It is an interprime number because it is at equal distance from previous prime (100102801) and next prime (100102837).

It is a cyclic number.

It is not a de Polignac number, because 100102819 - 2¹⁵ = 100070051 is a prime.

It is a super-2 number, since 2×100102819² = 20041148743493522, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 100102819.

It is not an unprimeable number, because it can be changed into a prime (100102019) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 335767 + ... + 336064.

It is an arithmetic number, because the mean of its divisors is an integer number (25193700).

Almost surely, 2^100102819 is an apocalyptic number.

100102819 is a deficient number, since it is larger than the sum of its proper divisors (671981).

100102819 is an equidigital number, since it uses as much as digits as its factorization.

100102819 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 671980.

The product of its (nonzero) digits is 144, while the sum is 22.

The square root of 100102819 is about 10005.1396292106. The cubic root of 100102819 is about 464.3179100446.

The spelling of 100102819 in words is "one hundred million, one hundred two thousand, eight hundred nineteen".