69230721 has 8 divisors (see below), whose sum is σ = 105494464. Its totient is φ = 39560400.

The previous prime is 69230717. The next prime is 69230741. The reversal of 69230721 is 12703296.

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

It is not a de Polignac number, because 69230721 - 2² = 69230717 is a prime.

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

It is the 8321-st Hogben number.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (69230741) by changing a digit.

It is a nontrivial repunit in base 8320.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1648330 + ... + 1648371.

It is an arithmetic number, because the mean of its divisors is an integer number (13186808).

Almost surely, 2^69230721 is an apocalyptic number.

It is an amenable number.

69230721 is a deficient number, since it is larger than the sum of its proper divisors (36263743).

69230721 is a wasteful number, since it uses less digits than its factorization.

69230721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3296711.

The product of its (nonzero) digits is 4536, while the sum is 30.

The square root of 69230721 is about 8320.5000450694. The cubic root of 69230721 is about 410.6132425297.

It can be divided in two parts, 692 and 30721, that added together give a palindrome (31413).

The spelling of 69230721 in words is "sixty-nine million, two hundred thirty thousand, seven hundred twenty-one".