55952639 has 2 divisors, whose sum is σ = 55952640. Its totient is φ = 55952638.

The previous prime is 55952599. The next prime is 55952641. The reversal of 55952639 is 93625955.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 55952639 - 2¹⁶ = 55887103 is a prime.

It is a super-2 number, since 2×55952639² = 6261395622128642, which contains 22 as substring.

Together with 55952641, it forms a pair of twin primes.

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 55952639.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (55951639) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27976319 + 27976320.

It is an arithmetic number, because the mean of its divisors is an integer number (27976320).

Almost surely, 2^55952639 is an apocalyptic number.

55952639 is a deficient number, since it is larger than the sum of its proper divisors (1).

55952639 is an equidigital number, since it uses as much as digits as its factorization.

55952639 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 364500, while the sum is 44.

The square root of 55952639 is about 7480.1496642781. The cubic root of 55952639 is about 382.4783509754.

The spelling of 55952639 in words is "fifty-five million, nine hundred fifty-two thousand, six hundred thirty-nine".