69672321 has 6 divisors (see below), whose sum is σ = 100637810. Its totient is φ = 46448208.

The previous prime is 69672311. The next prime is 69672347. The reversal of 69672321 is 12327696.

It can be written as a sum of positive squares in only one way, i.e., 43046721 + 26625600 = 6561^2 + 5160^2 .

It is not a de Polignac number, because 69672321 - 2⁵ = 69672289 is a prime.

It is an alternating number because its digits alternate between even and odd.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (69672311) 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 5 ways as a sum of consecutive naturals, for example, 3870676 + ... + 3870693.

Almost surely, 2^69672321 is an apocalyptic number.

It is an amenable number.

69672321 is a deficient number, since it is larger than the sum of its proper divisors (30965489).

69672321 is a wasteful number, since it uses less digits than its factorization.

69672321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7741375 (or 7741372 counting only the distinct ones).

The product of its digits is 27216, while the sum is 36.

The square root of 69672321 is about 8346.9947286434. The cubic root of 69672321 is about 411.4844483777.

The spelling of 69672321 in words is "sixty-nine million, six hundred seventy-two thousand, three hundred twenty-one".