2170706749 has 2 divisors, whose sum is σ = 2170706750. Its totient is φ = 2170706748.

The previous prime is 2170706729. The next prime is 2170706767. The reversal of 2170706749 is 9476070712.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1382501124 + 788205625 = 37182^2 + 28075^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2170706749 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2170706729) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1085353374 + 1085353375.

It is an arithmetic number, because the mean of its divisors is an integer number (1085353375).

Almost surely, 2^2170706749 is an apocalyptic number.

It is an amenable number.

2170706749 is a deficient number, since it is larger than the sum of its proper divisors (1).

2170706749 is an equidigital number, since it uses as much as digits as its factorization.

2170706749 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 148176, while the sum is 43.

The square root of 2170706749 is about 46590.8440468726. The cubic root of 2170706749 is about 1294.7931272631.

The spelling of 2170706749 in words is "two billion, one hundred seventy million, seven hundred six thousand, seven hundred forty-nine".