43732998137 has 2 divisors, whose sum is σ = 43732998138. Its totient is φ = 43732998136.

The previous prime is 43732998121. The next prime is 43732998161. The reversal of 43732998137 is 73189923734.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 38060498281 + 5672499856 = 195091^2 + 75316^2 .

It is a cyclic number.

It is not a de Polignac number, because 43732998137 - 2⁴ = 43732998121 is a prime.

It is not a weakly prime, because it can be changed into another prime (43732998437) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21866499068 + 21866499069.

It is an arithmetic number, because the mean of its divisors is an integer number (21866499069).

Almost surely, 2^43732998137 is an apocalyptic number.

It is an amenable number.

43732998137 is a deficient number, since it is larger than the sum of its proper divisors (1).

43732998137 is an equidigital number, since it uses as much as digits as its factorization.

43732998137 is an evil number, because the sum of its binary digits is even.

The product of its digits is 6858432, while the sum is 56.

The spelling of 43732998137 in words is "forty-three billion, seven hundred thirty-two million, nine hundred ninety-eight thousand, one hundred thirty-seven".