123898817 has 8 divisors (see below), whose sum is σ = 146481600. Its totient is φ = 102536784.

The previous prime is 123898811. The next prime is 123898849. The reversal of 123898817 is 718898321.

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

It is not a de Polignac number, because 123898817 - 2¹⁸ = 123636673 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (123898811) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 304967 + ... + 305372.

It is an arithmetic number, because the mean of its divisors is an integer number (18310200).

Almost surely, 2^123898817 is an apocalyptic number.

It is an amenable number.

123898817 is a deficient number, since it is larger than the sum of its proper divisors (22582783).

123898817 is an equidigital number, since it uses as much as digits as its factorization.

123898817 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 610375.

The product of its digits is 193536, while the sum is 47.

The square root of 123898817 is about 11130.9845476490. The cubic root of 123898817 is about 498.5274232934.

The spelling of 123898817 in words is "one hundred twenty-three million, eight hundred ninety-eight thousand, eight hundred seventeen".