2909714921 has 4 divisors (see below), whose sum is σ = 2910155844. Its totient is φ = 2909274000.

The previous prime is 2909714911. The next prime is 2909714923. The reversal of 2909714921 is 1294179092.

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 415711321 + 2494003600 = 20389^2 + 49940^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2909714921 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2909714923) 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, 210410 + ... + 223811.

It is an arithmetic number, because the mean of its divisors is an integer number (727538961).

Almost surely, 2^2909714921 is an apocalyptic number.

It is an amenable number.

2909714921 is a deficient number, since it is larger than the sum of its proper divisors (440923).

2909714921 is an equidigital number, since it uses as much as digits as its factorization.

2909714921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 440922.

The product of its (nonzero) digits is 81648, while the sum is 44.

The square root of 2909714921 is about 53941.7734320999. The cubic root of 2909714921 is about 1427.6337741752.

The spelling of 2909714921 in words is "two billion, nine hundred nine million, seven hundred fourteen thousand, nine hundred twenty-one".