2912721309 has 16 divisors (see below), whose sum is σ = 4317243840. Its totient is φ = 1940868720.

The previous prime is 2912721293. The next prime is 2912721319. The reversal of 2912721309 is 9031272192.

It is not a de Polignac number, because 2912721309 - 2⁴ = 2912721293 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2912721319) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 32614 + ... + 83000.

It is an arithmetic number, because the mean of its divisors is an integer number (269827740).

Almost surely, 2^2912721309 is an apocalyptic number.

It is an amenable number.

2912721309 is a deficient number, since it is larger than the sum of its proper divisors (1404522531).

2912721309 is a wasteful number, since it uses less digits than its factorization.

2912721309 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52537 (or 52531 counting only the distinct ones).

The product of its (nonzero) digits is 13608, while the sum is 36.

The square root of 2912721309 is about 53969.6332116497. The cubic root of 2912721309 is about 1428.1252935399.

The spelling of 2912721309 in words is "two billion, nine hundred twelve million, seven hundred twenty-one thousand, three hundred nine".