69898109 has 2 divisors, whose sum is σ = 69898110. Its totient is φ = 69898108.

The previous prime is 69898097. The next prime is 69898111. The reversal of 69898109 is 90189896.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 65254084 + 4644025 = 8078^2 + 2155^2 .

It is a cyclic number.

It is not a de Polignac number, because 69898109 - 2⁸ = 69897853 is a prime.

Together with 69898111, it forms a pair of twin primes.

It is a Chen prime.

It is an alternating number because its digits alternate between even and odd.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (69898159) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34949054 + 34949055.

It is an arithmetic number, because the mean of its divisors is an integer number (34949055).

Almost surely, 2^69898109 is an apocalyptic number.

It is an amenable number.

69898109 is a deficient number, since it is larger than the sum of its proper divisors (1).

69898109 is an equidigital number, since it uses as much as digits as its factorization.

69898109 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 279936, while the sum is 50.

The square root of 69898109 is about 8360.5088959943. The cubic root of 69898109 is about 411.9284700811.

It can be divided in two parts, 69898 and 109, that added together give a palindrome (70007).

The spelling of 69898109 in words is "sixty-nine million, eight hundred ninety-eight thousand, one hundred nine".