102807989 has 2 divisors, whose sum is σ = 102807990. Its totient is φ = 102807988.

The previous prime is 102807983. The next prime is 102808007. The reversal of 102807989 is 989708201.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 87142225 + 15665764 = 9335^2 + 3958^2 .

It is a cyclic number.

It is not a de Polignac number, because 102807989 - 2⁴ = 102807973 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (102807983) 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 as a sum of consecutive naturals, namely, 51403994 + 51403995.

It is an arithmetic number, because the mean of its divisors is an integer number (51403995).

Almost surely, 2^102807989 is an apocalyptic number.

It is an amenable number.

102807989 is a deficient number, since it is larger than the sum of its proper divisors (1).

102807989 is an equidigital number, since it uses as much as digits as its factorization.

102807989 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 72576, while the sum is 44.

The square root of 102807989 is about 10139.4274493188. The cubic root of 102807989 is about 468.4633517620.

The spelling of 102807989 in words is "one hundred two million, eight hundred seven thousand, nine hundred eighty-nine".