105680639 has 2 divisors, whose sum is σ = 105680640. Its totient is φ = 105680638.

The previous prime is 105680633. The next prime is 105680671. The reversal of 105680639 is 936086501.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 105680639 - 2²⁰ = 104632063 is a prime.

It is a super-2 number, since 2×105680639² = 22336794918896642, which contains 22 as substring.

It is equal to p_6069485 and since 105680639 and 6069485 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (105680633) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 52840319 + 52840320.

It is an arithmetic number, because the mean of its divisors is an integer number (52840320).

Almost surely, 2^105680639 is an apocalyptic number.

105680639 is a deficient number, since it is larger than the sum of its proper divisors (1).

105680639 is an equidigital number, since it uses as much as digits as its factorization.

105680639 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 38880, while the sum is 38.

The square root of 105680639 is about 10280.1089002014. The cubic root of 105680639 is about 472.7865831413.

The spelling of 105680639 in words is "one hundred five million, six hundred eighty thousand, six hundred thirty-nine".