631469 has 2 divisors, whose sum is σ = 631470. Its totient is φ = 631468.

The previous prime is 631459. The next prime is 631471. The reversal of 631469 is 964136.

631469 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 619369 + 12100 = 787^2 + 110^2 .

It is a cyclic number.

It is not a de Polignac number, because 631469 - 2⁴ = 631453 is a prime.

It is a super-2 number, since 2×631469² = 797506195922, which contains 22 as substring.

It is a Sophie Germain prime.

Together with 631471, it forms a pair of twin primes.

It is a Chen prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (631409) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 315734 + 315735.

It is an arithmetic number, because the mean of its divisors is an integer number (315735).

2⁶³¹⁴⁶⁹ is an apocalyptic number.

It is an amenable number.

631469 is a deficient number, since it is larger than the sum of its proper divisors (1).

631469 is an equidigital number, since it uses as much as digits as its factorization.

631469 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3888, while the sum is 29.

The square root of 631469 is about 794.6502375259. The cubic root of 631469 is about 85.7927676685.

The spelling of 631469 in words is "six hundred thirty-one thousand, four hundred sixty-nine".