631967 has 4 divisors (see below), whose sum is σ = 722256. Its totient is φ = 541680.

The previous prime is 631937. The next prime is 631979. The reversal of 631967 is 769136.

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 631967 - 2⁶ = 631903 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (631927) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 45134 + ... + 45147.

It is an arithmetic number, because the mean of its divisors is an integer number (180564).

2⁶³¹⁹⁶⁷ is an apocalyptic number.

631967 is a deficient number, since it is larger than the sum of its proper divisors (90289).

631967 is an equidigital number, since it uses as much as digits as its factorization.

631967 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 90288.

The product of its digits is 6804, while the sum is 32.

The square root of 631967 is about 794.9635211757. The cubic root of 631967 is about 85.8153148675.

The spelling of 631967 in words is "six hundred thirty-one thousand, nine hundred sixty-seven".