613601631 has 18 divisors (see below), whose sum is σ = 915521568. Its totient is φ = 395605080.

The previous prime is 613601629. The next prime is 613601683. The reversal of 613601631 is 136106316.

It is a happy number.

613601631 is a `hidden beast` number, since 613 + 6 + 0 + 16 + 31 = 666.

613601631 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 613601631 - 2¹ = 613601629 is a prime.

It is a super-2 number, since 2×613601631² = 753013923131720322, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 613601595 and 613601604.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (613601231) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 413016 + ... + 414498.

Almost surely, 2^613601631 is an apocalyptic number.

613601631 is a deficient number, since it is larger than the sum of its proper divisors (301919937).

613601631 is an equidigital number, since it uses as much as digits as its factorization.

613601631 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3003 (or 1517 counting only the distinct ones).

The product of its (nonzero) digits is 1944, while the sum is 27.

The square root of 613601631 is about 24770.9836502308. The cubic root of 613601631 is about 849.7584693216.

Adding to 613601631 its reverse (136106316), we get a palindrome (749707947).

The spelling of 613601631 in words is "six hundred thirteen million, six hundred one thousand, six hundred thirty-one".