631212469 has 4 divisors (see below), whose sum is σ = 631272096. Its totient is φ = 631152844.

The previous prime is 631212451. The next prime is 631212473. The reversal of 631212469 is 964212136.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 631212469 - 2¹⁵ = 631179701 is a prime.

It is a super-2 number, since 2×631212469² = 796858362042151922, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (631212419) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9169 + ... + 36694.

It is an arithmetic number, because the mean of its divisors is an integer number (157818024).

Almost surely, 2^631212469 is an apocalyptic number.

It is an amenable number.

631212469 is a deficient number, since it is larger than the sum of its proper divisors (59627).

631212469 is a wasteful number, since it uses less digits than its factorization.

631212469 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 59626.

The product of its digits is 15552, while the sum is 34.

The square root of 631212469 is about 25123.9421468845. The cubic root of 631212469 is about 857.8114847289.

It can be divided in two parts, 6312 and 12469, that added together give a palindrome (18781).

The spelling of 631212469 in words is "six hundred thirty-one million, two hundred twelve thousand, four hundred sixty-nine".