2721708987 has 8 divisors (see below), whose sum is σ = 3633086736. Its totient is φ = 1812401952.

The previous prime is 2721708971. The next prime is 2721708989. The reversal of 2721708987 is 7898071272.

It is a happy number.

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

It is not a de Polignac number, because 2721708987 - 2⁴ = 2721708971 is a prime.

It is a Smith number, since the sum of its digits (51) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (2721708989) 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, 514608 + ... + 519869.

It is an arithmetic number, because the mean of its divisors is an integer number (454135842).

Almost surely, 2^2721708987 is an apocalyptic number.

2721708987 is a deficient number, since it is larger than the sum of its proper divisors (911377749).

2721708987 is a wasteful number, since it uses less digits than its factorization.

2721708987 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1035357.

The product of its (nonzero) digits is 790272, while the sum is 51.

The square root of 2721708987 is about 52170.0008338125. Note that the first 3 decimals coincide. The cubic root of 2721708987 is about 1396.1986993887.

The spelling of 2721708987 in words is "two billion, seven hundred twenty-one million, seven hundred eight thousand, nine hundred eighty-seven".