43979892502109 has 2 divisors, whose sum is σ = 43979892502110. Its totient is φ = 43979892502108.

The previous prime is 43979892502103. The next prime is 43979892502163. The reversal of 43979892502109 is 90120529897934.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 43719668047225 + 260224454884 = 6612085^2 + 510122^2 .

It is a cyclic number.

It is not a de Polignac number, because 43979892502109 - 2⁴ = 43979892502093 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (43979892502103) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21989946251054 + 21989946251055.

It is an arithmetic number, because the mean of its divisors is an integer number (21989946251055).

Almost surely, 2^{43979892502109} is an apocalyptic number.

It is an amenable number.

43979892502109 is a deficient number, since it is larger than the sum of its proper divisors (1).

43979892502109 is an equidigital number, since it uses as much as digits as its factorization.

43979892502109 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 88179840, while the sum is 68.

The spelling of 43979892502109 in words is "forty-three trillion, nine hundred seventy-nine billion, eight hundred ninety-two million, five hundred two thousand, one hundred nine".