105239749 has 2 divisors, whose sum is σ = 105239750. Its totient is φ = 105239748.

The previous prime is 105239737. The next prime is 105239759. The reversal of 105239749 is 947932501.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 84309124 + 20930625 = 9182^2 + 4575^2 .

It is an emirp because it is prime and its reverse (947932501) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 105239749 - 2⁷ = 105239621 is a prime.

It is a super-2 number, since 2×105239749² = 22150809539166002, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (105239759) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 52619874 + 52619875.

It is an arithmetic number, because the mean of its divisors is an integer number (52619875).

Almost surely, 2^105239749 is an apocalyptic number.

It is an amenable number.

105239749 is a deficient number, since it is larger than the sum of its proper divisors (1).

105239749 is an equidigital number, since it uses as much as digits as its factorization.

105239749 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 68040, while the sum is 40.

The square root of 105239749 is about 10258.6426490058. The cubic root of 105239749 is about 472.1281925218.

The spelling of 105239749 in words is "one hundred five million, two hundred thirty-nine thousand, seven hundred forty-nine".