102906409 has 2 divisors, whose sum is σ = 102906410. Its totient is φ = 102906408.

The previous prime is 102906379. The next prime is 102906437. The reversal of 102906409 is 904609201.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 92698384 + 10208025 = 9628^2 + 3195^2 .

It is a cyclic number.

It is not a de Polignac number, because 102906409 - 2⁷ = 102906281 is a prime.

It is not a weakly prime, because it can be changed into another prime (102906499) 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 as a sum of consecutive naturals, namely, 51453204 + 51453205.

It is an arithmetic number, because the mean of its divisors is an integer number (51453205).

Almost surely, 2^102906409 is an apocalyptic number.

It is an amenable number.

102906409 is a deficient number, since it is larger than the sum of its proper divisors (1).

102906409 is an equidigital number, since it uses as much as digits as its factorization.

102906409 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3888, while the sum is 31.

The square root of 102906409 is about 10144.2796195689. The cubic root of 102906409 is about 468.6127936442.

The spelling of 102906409 in words is "one hundred two million, nine hundred six thousand, four hundred nine".