631875379 has 4 divisors (see below), whose sum is σ = 645319584. Its totient is φ = 618431176.

The previous prime is 631875353. The next prime is 631875383. The reversal of 631875379 is 973578136.

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

It is a cyclic number.

It is not a de Polignac number, because 631875379 - 2¹⁵ = 631842611 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (631875479) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6722032 + ... + 6722125.

It is an arithmetic number, because the mean of its divisors is an integer number (161329896).

Almost surely, 2^631875379 is an apocalyptic number.

631875379 is a deficient number, since it is larger than the sum of its proper divisors (13444205).

631875379 is a wasteful number, since it uses less digits than its factorization.

631875379 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13444204.

The product of its digits is 952560, while the sum is 49.

The square root of 631875379 is about 25137.1314791485. The cubic root of 631875379 is about 858.1116757032. Note that the first 3 decimals are identical.

The spelling of 631875379 in words is "six hundred thirty-one million, eight hundred seventy-five thousand, three hundred seventy-nine".