69813909 has 12 divisors (see below), whose sum is σ = 110009952. Its totient is φ = 42311400.

The previous prime is 69813881. The next prime is 69813911. The reversal of 69813909 is 90931896.

It is not a de Polignac number, because 69813909 - 2¹⁹ = 69289621 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (69813979) 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 11 ways as a sum of consecutive naturals, for example, 352497 + ... + 352694.

It is an arithmetic number, because the mean of its divisors is an integer number (9167496).

Almost surely, 2^69813909 is an apocalyptic number.

It is an amenable number.

69813909 is a deficient number, since it is larger than the sum of its proper divisors (40196043).

69813909 is a wasteful number, since it uses less digits than its factorization.

69813909 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 705208 (or 705205 counting only the distinct ones).

The product of its (nonzero) digits is 104976, while the sum is 45.

The square root of 69813909 is about 8355.4717999644. The cubic root of 69813909 is about 411.7629991594.

The spelling of 69813909 in words is "sixty-nine million, eight hundred thirteen thousand, nine hundred nine".