637434049 has 8 divisors (see below), whose sum is σ = 728656128. Its totient is φ = 546252000.

The previous prime is 637434043. The next prime is 637434067. The reversal of 637434049 is 940434736.

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

It is not a de Polignac number, because 637434049 - 2¹⁷ = 637302977 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (637434043) 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, 42504 + ... + 55510.

It is an arithmetic number, because the mean of its divisors is an integer number (91082016).

Almost surely, 2^637434049 is an apocalyptic number.

It is an amenable number.

637434049 is a deficient number, since it is larger than the sum of its proper divisors (91222079).

637434049 is a wasteful number, since it uses less digits than its factorization.

637434049 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20015.

The product of its (nonzero) digits is 217728, while the sum is 40.

The square root of 637434049 is about 25247.4562877134. The cubic root of 637434049 is about 860.6206305168.

The spelling of 637434049 in words is "six hundred thirty-seven million, four hundred thirty-four thousand, forty-nine".