55385783 has 2 divisors, whose sum is σ = 55385784. Its totient is φ = 55385782.

The previous prime is 55385773. The next prime is 55385831. The reversal of 55385783 is 38758355.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 55385783 - 2⁴ = 55385767 is a prime.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (55385773) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27692891 + 27692892.

It is an arithmetic number, because the mean of its divisors is an integer number (27692892).

Almost surely, 2^55385783 is an apocalyptic number.

55385783 is a deficient number, since it is larger than the sum of its proper divisors (1).

55385783 is an equidigital number, since it uses as much as digits as its factorization.

55385783 is an evil number, because the sum of its binary digits is even.

The product of its digits is 504000, while the sum is 44.

The square root of 55385783 is about 7442.1625217406. The cubic root of 55385783 is about 381.1823354609.

The spelling of 55385783 in words is "fifty-five million, three hundred eighty-five thousand, seven hundred eighty-three".