637121053 has 8 divisors (see below), whose sum is σ = 710104320. Its totient is φ = 568082880.

The previous prime is 637121011. The next prime is 637121059. The reversal of 637121053 is 350121736.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a de Polignac number, because none of the positive numbers 2^k-637121053 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (637121059) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 985933 + ... + 986578.

It is an arithmetic number, because the mean of its divisors is an integer number (88763040).

Almost surely, 2^637121053 is an apocalyptic number.

It is an amenable number.

637121053 is a deficient number, since it is larger than the sum of its proper divisors (72983267).

637121053 is a wasteful number, since it uses less digits than its factorization.

637121053 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1972547.

The product of its (nonzero) digits is 3780, while the sum is 28.

The square root of 637121053 is about 25241.2569615699. The cubic root of 637121053 is about 860.4797453975.

Adding to 637121053 its reverse (350121736), we get a palindrome (987242789).

It can be divided in two parts, 63712 and 1053, that multiplied together give a triangular number (67088736 = T₁₁₅₈₃).

The spelling of 637121053 in words is "six hundred thirty-seven million, one hundred twenty-one thousand, fifty-three".