630055 has 4 divisors (see below), whose sum is σ = 756072. Its totient is φ = 504040.

The previous prime is 630043. The next prime is 630067. The reversal of 630055 is 550036.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (630043) and next prime (630067).

It is not a de Polignac number, because 630055 - 2⁵ = 630023 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 63001 + ... + 63010.

It is an arithmetic number, because the mean of its divisors is an integer number (189018).

2⁶³⁰⁰⁵⁵ is an apocalyptic number.

630055 is a deficient number, since it is larger than the sum of its proper divisors (126017).

630055 is a wasteful number, since it uses less digits than its factorization.

630055 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 126016.

The product of its (nonzero) digits is 450, while the sum is 19.

The square root of 630055 is about 793.7600393066. The cubic root of 630055 is about 85.7286834280.

Subtracting from 630055 its sum of digits (19), we obtain a palindrome (630036).

The spelling of 630055 in words is "six hundred thirty thousand, fifty-five".