2144199977 has 4 divisors (see below), whose sum is σ = 2144908116. Its totient is φ = 2143491840.

The previous prime is 2144199923. The next prime is 2144199991. The reversal of 2144199977 is 7799914412.

It is a happy number.

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 979752601 + 1164447376 = 31301^2 + 34124^2 .

It is a cyclic number.

It is not a de Polignac number, because 2144199977 - 2⁸ = 2144199721 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2144199917) 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, 349508 + ... + 355589.

It is an arithmetic number, because the mean of its divisors is an integer number (536227029).

Almost surely, 2^2144199977 is an apocalyptic number.

It is an amenable number.

2144199977 is a deficient number, since it is larger than the sum of its proper divisors (708139).

2144199977 is an equidigital number, since it uses as much as digits as its factorization.

2144199977 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 708138.

The product of its digits is 1143072, while the sum is 53.

The square root of 2144199977 is about 46305.5069835112. The cubic root of 2144199977 is about 1289.5012347809.

The spelling of 2144199977 in words is "two billion, one hundred forty-four million, one hundred ninety-nine thousand, nine hundred seventy-seven".