2920729 has 8 divisors (see below), whose sum is σ = 3349568. Its totient is φ = 2494800.

The previous prime is 2920693. The next prime is 2920739. The reversal of 2920729 is 9270292.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a de Polignac number, because none of the positive numbers 2^k-2920729 is a prime.

It is a d-powerful number, because it can be written as 2⁴ + 9 + 2²⁰ + 0 + 7⁷ + 2²⁰ + 9 .

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 2920729.

It is not an unprimeable number, because it can be changed into a prime (2920739) 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, 2254 + ... + 3304.

It is an arithmetic number, because the mean of its divisors is an integer number (418696).

2^2920729 is an apocalyptic number.

It is an amenable number.

2920729 is a deficient number, since it is larger than the sum of its proper divisors (428839).

2920729 is a wasteful number, since it uses less digits than its factorization.

2920729 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1455.

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

The square root of 2920729 is about 1709.0140432425. The cubic root of 2920729 is about 142.9432836194.

The spelling of 2920729 in words is "two million, nine hundred twenty thousand, seven hundred twenty-nine".