55630073 has 4 divisors (see below), whose sum is σ = 56255220. Its totient is φ = 55004928.

The previous prime is 55630063. The next prime is 55630079. The reversal of 55630073 is 37003655.

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

It can be written as a sum of positive squares in 2 ways, for example, as 4892944 + 50737129 = 2212^2 + 7123^2 .

It is a cyclic number.

It is not a de Polignac number, because 55630073 - 2⁶ = 55630009 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (55630079) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 312440 + ... + 312617.

It is an arithmetic number, because the mean of its divisors is an integer number (14063805).

Almost surely, 2^55630073 is an apocalyptic number.

It is an amenable number.

55630073 is a deficient number, since it is larger than the sum of its proper divisors (625147).

55630073 is an equidigital number, since it uses as much as digits as its factorization.

55630073 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 625146.

The product of its (nonzero) digits is 9450, while the sum is 29.

The square root of 55630073 is about 7458.5570320270. The cubic root of 55630073 is about 381.7419403241.

The spelling of 55630073 in words is "fifty-five million, six hundred thirty thousand, seventy-three".