2137443409 has 2 divisors, whose sum is σ = 2137443410. Its totient is φ = 2137443408.

The previous prime is 2137443391. The next prime is 2137443419. The reversal of 2137443409 is 9043447312.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1278777600 + 858665809 = 35760^2 + 29303^2 .

It is a cyclic number.

It is not a de Polignac number, because 2137443409 - 2⁵ = 2137443377 is a prime.

It is not a weakly prime, because it can be changed into another prime (2137443419) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1068721704 + 1068721705.

It is an arithmetic number, because the mean of its divisors is an integer number (1068721705).

Almost surely, 2^2137443409 is an apocalyptic number.

It is an amenable number.

2137443409 is a deficient number, since it is larger than the sum of its proper divisors (1).

2137443409 is an equidigital number, since it uses as much as digits as its factorization.

2137443409 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 72576, while the sum is 37.

The square root of 2137443409 is about 46232.4930000535. The cubic root of 2137443409 is about 1288.1453646310.

The spelling of 2137443409 in words is "two billion, one hundred thirty-seven million, four hundred forty-three thousand, four hundred nine".