69669139 has 8 divisors (see below), whose sum is σ = 72912672. Its totient is φ = 66443520.

The previous prime is 69669109. The next prime is 69669151. The reversal of 69669139 is 93196696.

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

It is a cyclic number.

It is not a de Polignac number, because 69669139 - 2⁷ = 69669011 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 69669092 and 69669101.

It is not an unprimeable number, because it can be changed into a prime (69669109) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3829 + ... + 12409.

It is an arithmetic number, because the mean of its divisors is an integer number (9114084).

Almost surely, 2^69669139 is an apocalyptic number.

69669139 is a deficient number, since it is larger than the sum of its proper divisors (3243533).

69669139 is a wasteful number, since it uses less digits than its factorization.

69669139 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8957.

The product of its digits is 472392, while the sum is 49.

The square root of 69669139 is about 8346.8041189428. The cubic root of 69669139 is about 411.4781839893.

The spelling of 69669139 in words is "sixty-nine million, six hundred sixty-nine thousand, one hundred thirty-nine".