55835639 has 2 divisors, whose sum is σ = 55835640. Its totient is φ = 55835638.

The previous prime is 55835621. The next prime is 55835693. The reversal of 55835639 is 93653855.

Together with next prime (55835693) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 55835639 - 2²⁴ = 39058423 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 55835639.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (55835609) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27917819 + 27917820.

It is an arithmetic number, because the mean of its divisors is an integer number (27917820).

Almost surely, 2^55835639 is an apocalyptic number.

55835639 is a deficient number, since it is larger than the sum of its proper divisors (1).

55835639 is an equidigital number, since it uses as much as digits as its factorization.

55835639 is an evil number, because the sum of its binary digits is even.

The product of its digits is 486000, while the sum is 44.

The square root of 55835639 is about 7472.3248724878. The cubic root of 55835639 is about 382.2115706193.

The spelling of 55835639 in words is "fifty-five million, eight hundred thirty-five thousand, six hundred thirty-nine".