631672073 has 8 divisors (see below), whose sum is σ = 647698248. Its totient is φ = 615798144.

The previous prime is 631672061. The next prime is 631672121. The reversal of 631672073 is 370276136.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 169078009 + 462594064 = 13003^2 + 21508^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 631672073 - 2¹⁸ = 631409929 is a prime.

It is a super-3 number, since 3×631672073³ (a number of 27 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (631672273) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 29636 + ... + 46277.

It is an arithmetic number, because the mean of its divisors is an integer number (80962281).

Almost surely, 2^631672073 is an apocalyptic number.

It is an amenable number.

631672073 is a deficient number, since it is larger than the sum of its proper divisors (16026175).

631672073 is a wasteful number, since it uses less digits than its factorization.

631672073 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 76123.

The product of its (nonzero) digits is 31752, while the sum is 35.

The square root of 631672073 is about 25133.0872158595. The cubic root of 631672073 is about 858.0196333099.

The spelling of 631672073 in words is "six hundred thirty-one million, six hundred seventy-two thousand, seventy-three".