555106639 has 2 divisors, whose sum is σ = 555106640. Its totient is φ = 555106638.

The previous prime is 555106631. The next prime is 555106663. The reversal of 555106639 is 936601555.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 555106639 - 2³ = 555106631 is a prime.

It is equal to p_29099335 and since 555106639 and 29099335 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 (555106631) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 277553319 + 277553320.

It is an arithmetic number, because the mean of its divisors is an integer number (277553320).

Almost surely, 2^555106639 is an apocalyptic number.

555106639 is a deficient number, since it is larger than the sum of its proper divisors (1).

555106639 is an equidigital number, since it uses as much as digits as its factorization.

555106639 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 121500, while the sum is 40.

The square root of 555106639 is about 23560.7011567992. The cubic root of 555106639 is about 821.8492070900.

The spelling of 555106639 in words is "five hundred fifty-five million, one hundred six thousand, six hundred thirty-nine".