230709921 has 16 divisors (see below), whose sum is σ = 338982336. Its totient is φ = 138672576.

The previous prime is 230709917. The next prime is 230709923. The reversal of 230709921 is 129907032.

It is not a de Polignac number, because 230709921 - 2² = 230709917 is a prime.

It is not an unprimeable number, because it can be changed into a prime (230709923) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 67110 + ... + 70463.

It is an arithmetic number, because the mean of its divisors is an integer number (21186396).

Almost surely, 2^230709921 is an apocalyptic number.

It is an amenable number.

230709921 is a deficient number, since it is larger than the sum of its proper divisors (108272415).

230709921 is a wasteful number, since it uses less digits than its factorization.

230709921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 137632.

The product of its (nonzero) digits is 6804, while the sum is 33.

The square root of 230709921 is about 15189.1382573206. The cubic root of 230709921 is about 613.3223016749.

The spelling of 230709921 in words is "two hundred thirty million, seven hundred nine thousand, nine hundred twenty-one".