2072964721 has 4 divisors (see below), whose sum is σ = 2101361572. Its totient is φ = 2044567872.

The previous prime is 2072964709. The next prime is 2072964737. The reversal of 2072964721 is 1274692702.

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 451775025 + 1621189696 = 21255^2 + 40264^2 .

It is a cyclic number.

It is not a de Polignac number, because 2072964721 - 2¹¹ = 2072962673 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2072964781) 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, 14198316 + ... + 14198461.

It is an arithmetic number, because the mean of its divisors is an integer number (525340393).

Almost surely, 2^2072964721 is an apocalyptic number.

It is an amenable number.

2072964721 is a deficient number, since it is larger than the sum of its proper divisors (28396851).

2072964721 is an equidigital number, since it uses as much as digits as its factorization.

2072964721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28396850.

The product of its (nonzero) digits is 84672, while the sum is 40.

The square root of 2072964721 is about 45529.8223255923. The cubic root of 2072964721 is about 1275.0600450512.

The spelling of 2072964721 in words is "two billion, seventy-two million, nine hundred sixty-four thousand, seven hundred twenty-one".