55890563 has 2 divisors, whose sum is σ = 55890564. Its totient is φ = 55890562.

The previous prime is 55890557. The next prime is 55890599. The reversal of 55890563 is 36509855.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 55890563 - 2⁴ = 55890547 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 55890563.

It is not a weakly prime, because it can be changed into another prime (55890553) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27945281 + 27945282.

It is an arithmetic number, because the mean of its divisors is an integer number (27945282).

Almost surely, 2^55890563 is an apocalyptic number.

55890563 is a deficient number, since it is larger than the sum of its proper divisors (1).

55890563 is an equidigital number, since it uses as much as digits as its factorization.

55890563 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 162000, while the sum is 41.

The square root of 55890563 is about 7475.9991305510. Note that the first 3 decimals coincide. The cubic root of 55890563 is about 382.3368532593.

The spelling of 55890563 in words is "fifty-five million, eight hundred ninety thousand, five hundred sixty-three".