55705861 has 2 divisors, whose sum is σ = 55705862. Its totient is φ = 55705860.

The previous prime is 55705847. The next prime is 55705879. The reversal of 55705861 is 16850755.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 29757025 + 25948836 = 5455^2 + 5094^2 .

It is a cyclic number.

It is not a de Polignac number, because 55705861 - 2⁷ = 55705733 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 55705861.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (55705061) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27852930 + 27852931.

It is an arithmetic number, because the mean of its divisors is an integer number (27852931).

Almost surely, 2^55705861 is an apocalyptic number.

It is an amenable number.

55705861 is a deficient number, since it is larger than the sum of its proper divisors (1).

55705861 is an equidigital number, since it uses as much as digits as its factorization.

55705861 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 42000, while the sum is 37.

The square root of 55705861 is about 7463.6359101982. The cubic root of 55705861 is about 381.9152178832.

The spelling of 55705861 in words is "fifty-five million, seven hundred five thousand, eight hundred sixty-one".