784230421 has 8 divisors (see below), whose sum is σ = 847224504. Its totient is φ = 721617600.

The previous prime is 784230409. The next prime is 784230427. The reversal of 784230421 is 124032487.

It can be written as a sum of positive squares in 4 ways, for example, as 790321 + 783440100 = 889^2 + 27990^2 .

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 784230421 - 2⁵ = 784230389 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (784230427) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 91030 + ... + 99271.

It is an arithmetic number, because the mean of its divisors is an integer number (105903063).

Almost surely, 2^784230421 is an apocalyptic number.

It is an amenable number.

784230421 is a deficient number, since it is larger than the sum of its proper divisors (62994083).

784230421 is a wasteful number, since it uses less digits than its factorization.

784230421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 190631.

The product of its (nonzero) digits is 10752, while the sum is 31.

The square root of 784230421 is about 28004.1143584295. The cubic root of 784230421 is about 922.1775847112.

The spelling of 784230421 in words is "seven hundred eighty-four million, two hundred thirty thousand, four hundred twenty-one".