69788009 has 12 divisors (see below), whose sum is σ = 74825724. Its totient is φ = 65071104.

The previous prime is 69787999. The next prime is 69788021. The reversal of 69788009 is 90088796.

It can be written as a sum of positive squares in 6 ways, for example, as 6744409 + 63043600 = 2597^2 + 7940^2 .

It is not a de Polignac number, because 69788009 - 2¹⁶ = 69722473 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (69788029) 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, 31589 + ... + 33725.

It is an arithmetic number, because the mean of its divisors is an integer number (6235477).

Almost surely, 2^69788009 is an apocalyptic number.

It is an amenable number.

69788009 is a deficient number, since it is larger than the sum of its proper divisors (5037715).

69788009 is a wasteful number, since it uses less digits than its factorization.

69788009 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2284 (or 2267 counting only the distinct ones).

The product of its (nonzero) digits is 217728, while the sum is 47.

The square root of 69788009 is about 8353.9217736342. The cubic root of 69788009 is about 411.7120733916.

The spelling of 69788009 in words is "sixty-nine million, seven hundred eighty-eight thousand, nine".