4721929 has 9 divisors (see below), whose sum is σ = 4932949. Its totient is φ = 4519840.

The previous prime is 4721911. The next prime is 4721933. The reversal of 4721929 is 9291274.

It is a happy number.

The square root of 4721929 is 2173.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in 4 ways, for example, as 511225 + 4210704 = 715^2 + 2052^2 .

It is not a de Polignac number, because 4721929 - 2⁵ = 4721897 is a prime.

It is a super-2 number, since 2×4721929² = 44593226962082, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 4721894 and 4721903.

It is not an unprimeable number, because it can be changed into a prime (4721999) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 89067 + ... + 89119.

Almost surely, 2^4721929 is an apocalyptic number.

4721929 is the 2173-rd square number.

4721929 is the 1087-th centered octagonal number.

It is an amenable number.

4721929 is a deficient number, since it is larger than the sum of its proper divisors (211020).

4721929 is an frugal number, since it uses more digits than its factorization.

4721929 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 188 (or 94 counting only the distinct ones).

The product of its digits is 9072, while the sum is 34.

The cubic root of 4721929 is about 167.7669790021.

It can be divided in two parts, 472 and 1929, that added together give a 4-th power (2401 = 7⁴).

The spelling of 4721929 in words is "four million, seven hundred twenty-one thousand, nine hundred twenty-nine".