105731939 has 2 divisors, whose sum is σ = 105731940. Its totient is φ = 105731938.

The previous prime is 105731933. The next prime is 105731947. The reversal of 105731939 is 939137501.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 105731939 - 2⁸ = 105731683 is a prime.

It is a super-2 number, since 2×105731939² = 22358485849399442, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (105731933) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 52865969 + 52865970.

It is an arithmetic number, because the mean of its divisors is an integer number (52865970).

Almost surely, 2^105731939 is an apocalyptic number.

105731939 is a deficient number, since it is larger than the sum of its proper divisors (1).

105731939 is an equidigital number, since it uses as much as digits as its factorization.

105731939 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 25515, while the sum is 38.

The square root of 105731939 is about 10282.6037072329. The cubic root of 105731939 is about 472.8630715392.

The spelling of 105731939 in words is "one hundred five million, seven hundred thirty-one thousand, nine hundred thirty-nine".