69809138 has 8 divisors (see below), whose sum is σ = 119672832. Its totient is φ = 29918196.

The previous prime is 69809137. The next prime is 69809143. The reversal of 69809138 is 83190896.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (69809137) 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 in 3 ways as a sum of consecutive naturals, for example, 2493170 + ... + 2493197.

It is an arithmetic number, because the mean of its divisors is an integer number (14959104).

Almost surely, 2^69809138 is an apocalyptic number.

69809138 is a deficient number, since it is larger than the sum of its proper divisors (49863694).

69809138 is a wasteful number, since it uses less digits than its factorization.

69809138 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4986376.

The product of its (nonzero) digits is 93312, while the sum is 44.

The square root of 69809138 is about 8355.1862935544. The cubic root of 69809138 is about 411.7536191469.

The spelling of 69809138 in words is "sixty-nine million, eight hundred nine thousand, one hundred thirty-eight".