102798643 has 8 divisors (see below), whose sum is σ = 109205712. Its totient is φ = 96431616.

The previous prime is 102798629. The next prime is 102798659. The reversal of 102798643 is 346897201.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 102798643 - 2⁵ = 102798611 is a prime.

It is a super-2 number, since 2×102798643² = 21135122005282898, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 102798596 and 102798605.

It is not an unprimeable number, because it can be changed into a prime (102798043) 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 in 7 ways as a sum of consecutive naturals, for example, 4630 + ... + 15067.

It is an arithmetic number, because the mean of its divisors is an integer number (13650714).

Almost surely, 2^102798643 is an apocalyptic number.

102798643 is a deficient number, since it is larger than the sum of its proper divisors (6407069).

102798643 is a wasteful number, since it uses less digits than its factorization.

102798643 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20021.

The product of its (nonzero) digits is 72576, while the sum is 40.

The square root of 102798643 is about 10138.9665646948. The cubic root of 102798643 is about 468.4491557473.

The spelling of 102798643 in words is "one hundred two million, seven hundred ninety-eight thousand, six hundred forty-three".