105990779 has 2 divisors, whose sum is σ = 105990780. Its totient is φ = 105990778.

The previous prime is 105990769. The next prime is 105990793. The reversal of 105990779 is 977099501.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 105990779 - 2⁴ = 105990763 is a prime.

It is a super-2 number, since 2×105990779² = 22468090466053682, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (105990749) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 52995389 + 52995390.

It is an arithmetic number, because the mean of its divisors is an integer number (52995390).

Almost surely, 2^105990779 is an apocalyptic number.

105990779 is a deficient number, since it is larger than the sum of its proper divisors (1).

105990779 is an equidigital number, since it uses as much as digits as its factorization.

105990779 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 178605, while the sum is 47.

The square root of 105990779 is about 10295.1823199009. The cubic root of 105990779 is about 473.2486255985.

The spelling of 105990779 in words is "one hundred five million, nine hundred ninety thousand, seven hundred seventy-nine".