69661289 has 8 divisors (see below), whose sum is σ = 70292040. Its totient is φ = 69033600.

The previous prime is 69661271. The next prime is 69661297. The reversal of 69661289 is 98216696.

It can be written as a sum of positive squares in 4 ways, for example, as 8508889 + 61152400 = 2917^2 + 7820^2 .

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 69661289 - 2¹² = 69657193 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (69661589) 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 7 ways as a sum of consecutive naturals, for example, 73559 + ... + 74499.

It is an arithmetic number, because the mean of its divisors is an integer number (8786505).

Almost surely, 2^69661289 is an apocalyptic number.

It is an amenable number.

69661289 is a deficient number, since it is larger than the sum of its proper divisors (630751).

69661289 is a wasteful number, since it uses less digits than its factorization.

69661289 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1531.

The product of its digits is 279936, while the sum is 47.

The square root of 69661289 is about 8346.3338658359. Note that the first 3 decimals coincide. The cubic root of 69661289 is about 411.4627289154.

The spelling of 69661289 in words is "sixty-nine million, six hundred sixty-one thousand, two hundred eighty-nine".