2027721987 has 12 divisors (see below), whose sum is σ = 2991250080. Its totient is φ = 1323052368.

The previous prime is 2027721961. The next prime is 2027721991. The reversal of 2027721987 is 7891277202.

It is not a de Polignac number, because 2027721987 - 2¹⁵ = 2027689219 is a prime.

It is a super-2 number, since 2×2027721987² = 8223312913126456338, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (2027721947) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2396412 + ... + 2397257.

It is an arithmetic number, because the mean of its divisors is an integer number (249270840).

Almost surely, 2^2027721987 is an apocalyptic number.

2027721987 is a deficient number, since it is larger than the sum of its proper divisors (963528093).

2027721987 is a wasteful number, since it uses less digits than its factorization.

2027721987 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4793722 (or 4793719 counting only the distinct ones).

The product of its (nonzero) digits is 197568, while the sum is 45.

The square root of 2027721987 is about 45030.2341432953. The cubic root of 2027721987 is about 1265.7156114952.

The spelling of 2027721987 in words is "two billion, twenty-seven million, seven hundred twenty-one thousand, nine hundred eighty-seven".