631401393 has 8 divisors (see below), whose sum is σ = 962135488. Its totient is φ = 360800784.

The previous prime is 631401391. The next prime is 631401409. The reversal of 631401393 is 393104136.

631401393 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is not a de Polignac number, because 631401393 - 2¹ = 631401391 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 631401393.

It is not an unprimeable number, because it can be changed into a prime (631401391) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15033346 + ... + 15033387.

It is an arithmetic number, because the mean of its divisors is an integer number (120266936).

Almost surely, 2^631401393 is an apocalyptic number.

It is an amenable number.

631401393 is a deficient number, since it is larger than the sum of its proper divisors (330734095).

631401393 is a wasteful number, since it uses less digits than its factorization.

631401393 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30066743.

The product of its (nonzero) digits is 5832, while the sum is 30.

The square root of 631401393 is about 25127.7017054883. The cubic root of 631401393 is about 857.8970581394.

The spelling of 631401393 in words is "six hundred thirty-one million, four hundred one thousand, three hundred ninety-three".