4782609721 has 4 divisors (see below), whose sum is σ = 4782878244. Its totient is φ = 4782341200.

The previous prime is 4782609659. The next prime is 4782609731. The reversal of 4782609721 is 1279062874.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1279062874 = 2 ⋅639531437.

It can be written as a sum of positive squares in 2 ways, for example, as 3394227600 + 1388382121 = 58260^2 + 37261^2 .

It is a cyclic number.

It is not a de Polignac number, because 4782609721 - 2⁷ = 4782609593 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (4782609731) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 105490 + ... + 143851.

It is an arithmetic number, because the mean of its divisors is an integer number (1195719561).

Almost surely, 2^4782609721 is an apocalyptic number.

It is an amenable number.

4782609721 is a deficient number, since it is larger than the sum of its proper divisors (268523).

4782609721 is a wasteful number, since it uses less digits than its factorization.

4782609721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 268522.

The product of its (nonzero) digits is 338688, while the sum is 46.

The square root of 4782609721 is about 69156.4148940646. The cubic root of 4782609721 is about 1684.8257085938.

The spelling of 4782609721 in words is "four billion, seven hundred eighty-two million, six hundred nine thousand, seven hundred twenty-one".