2171006837 has 2 divisors, whose sum is σ = 2171006838. Its totient is φ = 2171006836.

The previous prime is 2171006819. The next prime is 2171006863. The reversal of 2171006837 is 7386001712.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1621995076 + 549011761 = 40274^2 + 23431^2 .

It is a cyclic number.

It is not a de Polignac number, because 2171006837 - 2⁸ = 2171006581 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2171006797 and 2171006806.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2171006137) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1085503418 + 1085503419.

It is an arithmetic number, because the mean of its divisors is an integer number (1085503419).

Almost surely, 2^2171006837 is an apocalyptic number.

It is an amenable number.

2171006837 is a deficient number, since it is larger than the sum of its proper divisors (1).

2171006837 is an equidigital number, since it uses as much as digits as its factorization.

2171006837 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 14112, while the sum is 35.

The square root of 2171006837 is about 46594.0643966589. The cubic root of 2171006837 is about 1294.8527904698.

The spelling of 2171006837 in words is "two billion, one hundred seventy-one million, six thousand, eight hundred thirty-seven".