2720929 has 4 divisors (see below), whose sum is σ = 2758276. Its totient is φ = 2683584.

The previous prime is 2720917. The next prime is 2720953. The reversal of 2720929 is 9290272.

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 1827904 + 893025 = 1352^2 + 945^2 .

It is a cyclic number.

It is not a de Polignac number, because 2720929 - 2⁵ = 2720897 is a prime.

It is a d-powerful number, because it can be written as 2⁹ + 7 + 2¹⁵ + 0 + 9⁵ + 2²¹ + 9⁶ .

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2720929.

It is not an unprimeable number, because it can be changed into a prime (2720999) 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, 18564 + ... + 18709.

It is an arithmetic number, because the mean of its divisors is an integer number (689569).

2^2720929 is an apocalyptic number.

It is an amenable number.

2720929 is a deficient number, since it is larger than the sum of its proper divisors (37347).

2720929 is an equidigital number, since it uses as much as digits as its factorization.

2720929 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37346.

The product of its (nonzero) digits is 4536, while the sum is 31.

The square root of 2720929 is about 1649.5238706972. The cubic root of 2720929 is about 139.6065312500.

The spelling of 2720929 in words is "two million, seven hundred twenty thousand, nine hundred twenty-nine".