2143973077 has 4 divisors (see below), whose sum is σ = 2193832960. Its totient is φ = 2094113196.

The previous prime is 2143973063. The next prime is 2143973131. The reversal of 2143973077 is 7703793412.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 2143973077 - 2¹⁹ = 2143448789 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (43), and also a Moran number because the ratio is a prime number: 49859839 = 2143973077 / (2 + 1 + 4 + 3 + 9 + 7 + 3 + 0 + 7 + 7).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2143973677) 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, 24929877 + ... + 24929962.

It is an arithmetic number, because the mean of its divisors is an integer number (548458240).

Almost surely, 2^2143973077 is an apocalyptic number.

It is an amenable number.

2143973077 is a deficient number, since it is larger than the sum of its proper divisors (49859883).

2143973077 is an equidigital number, since it uses as much as digits as its factorization.

2143973077 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49859882.

The product of its (nonzero) digits is 222264, while the sum is 43.

The square root of 2143973077 is about 46303.0568861279. The cubic root of 2143973077 is about 1289.4557480175.

The spelling of 2143973077 in words is "two billion, one hundred forty-three million, nine hundred seventy-three thousand, seventy-seven".