102802989 has 4 divisors (see below), whose sum is σ = 137070656. Its totient is φ = 68535324.

The previous prime is 102802979. The next prime is 102803011. The reversal of 102802989 is 989208201.

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.

It is not a de Polignac number, because 102802989 - 2²⁰ = 101754413 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (102802979) 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 3 ways as a sum of consecutive naturals, for example, 17133829 + ... + 17133834.

It is an arithmetic number, because the mean of its divisors is an integer number (34267664).

Almost surely, 2^102802989 is an apocalyptic number.

It is an amenable number.

102802989 is a deficient number, since it is larger than the sum of its proper divisors (34267667).

102802989 is an equidigital number, since it uses as much as digits as its factorization.

102802989 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34267666.

The product of its (nonzero) digits is 20736, while the sum is 39.

The square root of 102802989 is about 10139.1808840754. The cubic root of 102802989 is about 468.4557571682.

The spelling of 102802989 in words is "one hundred two million, eight hundred two thousand, nine hundred eighty-nine".