10505639 has 2 divisors, whose sum is σ = 10505640. Its totient is φ = 10505638.

The previous prime is 10505623. The next prime is 10505647. The reversal of 10505639 is 93650501.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 10505639 - 2⁴ = 10505623 is a prime.

It is a super-2 number, since 2×10505639² = 220736901596642, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (10505699) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5252819 + 5252820.

It is an arithmetic number, because the mean of its divisors is an integer number (5252820).

Almost surely, 2^10505639 is an apocalyptic number.

10505639 is a deficient number, since it is larger than the sum of its proper divisors (1).

10505639 is an equidigital number, since it uses as much as digits as its factorization.

10505639 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4050, while the sum is 29.

The square root of 10505639 is about 3241.2403490022. The cubic root of 10505639 is about 219.0151501511.

The spelling of 10505639 in words is "ten million, five hundred five thousand, six hundred thirty-nine".