127722987 has 48 divisors (see below), whose sum is σ = 221079040. Its totient is φ = 72275976.

The previous prime is 127722953. The next prime is 127723009. The reversal of 127722987 is 789227721.

It is not a de Polignac number, because 127722987 - 2¹² = 127718891 is a prime.

It is a super-2 number, since 2×127722987² = 32626322816404338, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (127722937) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1239978 + ... + 1240080.

Almost surely, 2^127722987 is an apocalyptic number.

127722987 is a deficient number, since it is larger than the sum of its proper divisors (93356053).

127722987 is an frugal number, since it uses more digits than its factorization.

127722987 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 143 (or 113 counting only the distinct ones).

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

The square root of 127722987 is about 11301.4595075149. The cubic root of 127722987 is about 503.6046005956.

The spelling of 127722987 in words is "one hundred twenty-seven million, seven hundred twenty-two thousand, nine hundred eighty-seven".