105881779 has 2 divisors, whose sum is σ = 105881780. Its totient is φ = 105881778.

The previous prime is 105881777. The next prime is 105881821. The reversal of 105881779 is 977188501.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 105881779 - 2¹ = 105881777 is a prime.

It is a super-2 number, since 2×105881779² = 22421902248409682, which contains 22 as substring.

Together with 105881777, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (105881773) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 52940889 + 52940890.

It is an arithmetic number, because the mean of its divisors is an integer number (52940890).

Almost surely, 2^105881779 is an apocalyptic number.

105881779 is a deficient number, since it is larger than the sum of its proper divisors (1).

105881779 is an equidigital number, since it uses as much as digits as its factorization.

105881779 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 141120, while the sum is 46.

The square root of 105881779 is about 10289.8872199845. The cubic root of 105881779 is about 473.0863416915.

The spelling of 105881779 in words is "one hundred five million, eight hundred eighty-one thousand, seven hundred seventy-nine".