2143239937 has 2 divisors, whose sum is σ = 2143239938. Its totient is φ = 2143239936.

The previous prime is 2143239899. The next prime is 2143239949. The reversal of 2143239937 is 7399323412.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1119303936 + 1023936001 = 33456^2 + 31999^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2143239937 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2143239893 and 2143239902.

It is not a weakly prime, because it can be changed into another prime (2143239977) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1071619968 + 1071619969.

It is an arithmetic number, because the mean of its divisors is an integer number (1071619969).

Almost surely, 2^2143239937 is an apocalyptic number.

It is an amenable number.

2143239937 is a deficient number, since it is larger than the sum of its proper divisors (1).

2143239937 is an equidigital number, since it uses as much as digits as its factorization.

2143239937 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 244944, while the sum is 43.

The square root of 2143239937 is about 46295.1394532947. The cubic root of 2143239937 is about 1289.3087531114.

The spelling of 2143239937 in words is "two billion, one hundred forty-three million, two hundred thirty-nine thousand, nine hundred thirty-seven".