105990623 has 2 divisors, whose sum is σ = 105990624. Its totient is φ = 105990622.

The previous prime is 105990559. The next prime is 105990641. The reversal of 105990623 is 326099501.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 105990623 - 2⁶ = 105990559 is a prime.

It is a super-2 number, since 2×105990623² = 22468024327856258, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (105990653) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 52995311 + 52995312.

It is an arithmetic number, because the mean of its divisors is an integer number (52995312).

Almost surely, 2^105990623 is an apocalyptic number.

105990623 is a deficient number, since it is larger than the sum of its proper divisors (1).

105990623 is an equidigital number, since it uses as much as digits as its factorization.

105990623 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 14580, while the sum is 35.

The square root of 105990623 is about 10295.1747435388. The cubic root of 105990623 is about 473.2483934185.

The spelling of 105990623 in words is "one hundred five million, nine hundred ninety thousand, six hundred twenty-three".