234380721 has 4 divisors (see below), whose sum is σ = 312507632. Its totient is φ = 156253812.

The previous prime is 234380693. The next prime is 234380743. The reversal of 234380721 is 127083432.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 234380721 - 2⁷ = 234380593 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (234380761) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 39063451 + ... + 39063456.

It is an arithmetic number, because the mean of its divisors is an integer number (78126908).

Almost surely, 2^234380721 is an apocalyptic number.

It is an amenable number.

234380721 is a deficient number, since it is larger than the sum of its proper divisors (78126911).

234380721 is an equidigital number, since it uses as much as digits as its factorization.

234380721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 78126910.

The product of its (nonzero) digits is 8064, while the sum is 30.

The square root of 234380721 is about 15309.4977383322. The cubic root of 234380721 is about 616.5580351460.

The spelling of 234380721 in words is "two hundred thirty-four million, three hundred eighty thousand, seven hundred twenty-one".