631329123 has 4 divisors (see below), whose sum is σ = 841772168. Its totient is φ = 420886080.

The previous prime is 631329121. The next prime is 631329137. The reversal of 631329123 is 321923136.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 631329123 - 2¹ = 631329121 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (631329121) 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 3 ways as a sum of consecutive naturals, for example, 105221518 + ... + 105221523.

It is an arithmetic number, because the mean of its divisors is an integer number (210443042).

Almost surely, 2^631329123 is an apocalyptic number.

631329123 is a deficient number, since it is larger than the sum of its proper divisors (210443045).

631329123 is a wasteful number, since it uses less digits than its factorization.

631329123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 210443044.

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

The square root of 631329123 is about 25126.2636100157. The cubic root of 631329123 is about 857.8643253502.

The spelling of 631329123 in words is "six hundred thirty-one million, three hundred twenty-nine thousand, one hundred twenty-three".