43137313873 has 2 divisors, whose sum is σ = 43137313874. Its totient is φ = 43137313872.

The previous prime is 43137313847. The next prime is 43137313927. The reversal of 43137313873 is 37831373134.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 42167801104 + 969512769 = 205348^2 + 31137^2 .

It is a cyclic number.

It is not a de Polignac number, because 43137313873 - 2²⁹ = 42600442961 is a prime.

It is not a weakly prime, because it can be changed into another prime (43137313823) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21568656936 + 21568656937.

It is an arithmetic number, because the mean of its divisors is an integer number (21568656937).

Almost surely, 2^43137313873 is an apocalyptic number.

It is an amenable number.

43137313873 is a deficient number, since it is larger than the sum of its proper divisors (1).

43137313873 is an equidigital number, since it uses as much as digits as its factorization.

43137313873 is an evil number, because the sum of its binary digits is even.

The product of its digits is 381024, while the sum is 43.

The spelling of 43137313873 in words is "forty-three billion, one hundred thirty-seven million, three hundred thirteen thousand, eight hundred seventy-three".