631849 has 4 divisors (see below), whose sum is σ = 648964. Its totient is φ = 614736.

The previous prime is 631847. The next prime is 631853. The reversal of 631849 is 948136.

631849 = T₁₆₆ + T₁₆₇ + ... + T₂₀₂.

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

It can be written as a sum of positive squares in 2 ways, for example, as 435600 + 196249 = 660^2 + 443^2 .

It is a cyclic number.

It is not a de Polignac number, because 631849 - 2¹ = 631847 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 631849.

It is not an unprimeable number, because it can be changed into a prime (631843) 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, 8502 + ... + 8575.

It is an arithmetic number, because the mean of its divisors is an integer number (162241).

2⁶³¹⁸⁴⁹ is an apocalyptic number.

It is an amenable number.

631849 is a deficient number, since it is larger than the sum of its proper divisors (17115).

631849 is a wasteful number, since it uses less digits than its factorization.

631849 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17114.

The product of its digits is 5184, while the sum is 31.

The square root of 631849 is about 794.8893004689. The cubic root of 631849 is about 85.8099734296.

The spelling of 631849 in words is "six hundred thirty-one thousand, eight hundred forty-nine".