4720629721 has 4 divisors (see below), whose sum is σ = 4747916772. Its totient is φ = 4693342672.

The previous prime is 4720629709. The next prime is 4720629737. The reversal of 4720629721 is 1279260274.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 3071376400 + 1649253321 = 55420^2 + 40611^2 .

It is a cyclic number.

It is not a de Polignac number, because 4720629721 - 2⁷ = 4720629593 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (4720629701) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13643266 + ... + 13643611.

It is an arithmetic number, because the mean of its divisors is an integer number (1186979193).

Almost surely, 2^4720629721 is an apocalyptic number.

It is an amenable number.

4720629721 is a deficient number, since it is larger than the sum of its proper divisors (27287051).

4720629721 is a wasteful number, since it uses less digits than its factorization.

4720629721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27287050.

The product of its (nonzero) digits is 84672, while the sum is 40.

The square root of 4720629721 is about 68706.8389681842. The cubic root of 4720629721 is about 1677.5159008593.

Adding to 4720629721 its reverse (1279260274), we get a palindrome (5999889995).

The spelling of 4720629721 in words is "four billion, seven hundred twenty million, six hundred twenty-nine thousand, seven hundred twenty-one".