105870693949 has 2 divisors, whose sum is σ = 105870693950. Its totient is φ = 105870693948.

The previous prime is 105870693947. The next prime is 105870693961. The reversal of 105870693949 is 949396078501.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 57237213049 + 48633480900 = 239243^2 + 220530^2 .

It is a cyclic number.

It is not a de Polignac number, because 105870693949 - 2¹ = 105870693947 is a prime.

It is a super-2 number, since 2×105870693949² (a number of 23 digits) contains 22 as substring.

Together with 105870693947, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (105870693947) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 52935346974 + 52935346975.

It is an arithmetic number, because the mean of its divisors is an integer number (52935346975).

Almost surely, 2^105870693949 is an apocalyptic number.

It is an amenable number.

105870693949 is a deficient number, since it is larger than the sum of its proper divisors (1).

105870693949 is an equidigital number, since it uses as much as digits as its factorization.

105870693949 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 14696640, while the sum is 61.

The spelling of 105870693949 in words is "one hundred five billion, eight hundred seventy million, six hundred ninety-three thousand, nine hundred forty-nine".