636973073 has 4 divisors (see below), whose sum is σ = 694879728. Its totient is φ = 579066420.

The previous prime is 636973067. The next prime is 636973079. The reversal of 636973073 is 370379636.

636973073 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is an interprime number because it is at equal distance from previous prime (636973067) and next prime (636973079).

It is a cyclic number.

It is not a de Polignac number, because 636973073 - 2¹⁸ = 636710929 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (636973079) 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, 28953311 + ... + 28953332.

It is an arithmetic number, because the mean of its divisors is an integer number (173719932).

Almost surely, 2^636973073 is an apocalyptic number.

It is an amenable number.

636973073 is a deficient number, since it is larger than the sum of its proper divisors (57906655).

636973073 is a wasteful number, since it uses less digits than its factorization.

636973073 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 57906654.

The product of its (nonzero) digits is 428652, while the sum is 44.

The square root of 636973073 is about 25238.3254793182. The cubic root of 636973073 is about 860.4131208779.

The spelling of 636973073 in words is "six hundred thirty-six million, nine hundred seventy-three thousand, seventy-three".