42437000909 has 2 divisors, whose sum is σ = 42437000910. Its totient is φ = 42437000908.

The previous prime is 42437000857. The next prime is 42437000917. The reversal of 42437000909 is 90900073424.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 39493612900 + 2943388009 = 198730^2 + 54253^2 .

It is a cyclic number.

It is not a de Polignac number, because 42437000909 - 2¹² = 42436996813 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42437000929) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21218500454 + 21218500455.

It is an arithmetic number, because the mean of its divisors is an integer number (21218500455).

Almost surely, 2^42437000909 is an apocalyptic number.

It is an amenable number.

42437000909 is a deficient number, since it is larger than the sum of its proper divisors (1).

42437000909 is an equidigital number, since it uses as much as digits as its factorization.

42437000909 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 54432, while the sum is 38.

The spelling of 42437000909 in words is "forty-two billion, four hundred thirty-seven million, nine hundred nine", and thus it is an aban number.