102408689 has 4 divisors (see below), whose sum is σ = 107798640. Its totient is φ = 97018740.

The previous prime is 102408679. The next prime is 102408701. The reversal of 102408689 is 986804201.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 986804201 = 24781 ⋅39821.

It is a cyclic number.

It is not a de Polignac number, because 102408689 - 2²⁴ = 85631473 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (102408619) 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 3 ways as a sum of consecutive naturals, for example, 2694947 + ... + 2694984.

It is an arithmetic number, because the mean of its divisors is an integer number (26949660).

Almost surely, 2^102408689 is an apocalyptic number.

102408689 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

It is an amenable number.

102408689 is a deficient number, since it is larger than the sum of its proper divisors (5389951).

102408689 is an equidigital number, since it uses as much as digits as its factorization.

102408689 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5389950.

The product of its (nonzero) digits is 27648, while the sum is 38.

The square root of 102408689 is about 10119.7178320346. The cubic root of 102408689 is about 467.8560704430.

The spelling of 102408689 in words is "one hundred two million, four hundred eight thousand, six hundred eighty-nine".