102988909 has 4 divisors (see below), whose sum is σ = 103073404. Its totient is φ = 102904416.

The previous prime is 102988901. The next prime is 102988937. The reversal of 102988909 is 909889201.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 909889201 = 13 ⋅69991477.

It can be written as a sum of positive squares in 2 ways, for example, as 84584809 + 18404100 = 9197^2 + 4290^2 .

It is a cyclic number.

It is not a de Polignac number, because 102988909 - 2³ = 102988901 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 (102988901) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 40392 + ... + 42865.

It is an arithmetic number, because the mean of its divisors is an integer number (25768351).

Almost surely, 2^102988909 is an apocalyptic number.

It is an amenable number.

102988909 is a deficient number, since it is larger than the sum of its proper divisors (84495).

102988909 is an equidigital number, since it uses as much as digits as its factorization.

102988909 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 84494.

The product of its (nonzero) digits is 93312, while the sum is 46.

The square root of 102988909 is about 10148.3451360308. The cubic root of 102988909 is about 468.7379890493.

The spelling of 102988909 in words is "one hundred two million, nine hundred eighty-eight thousand, nine hundred nine".