612631 has 4 divisors (see below), whose sum is σ = 614200. Its totient is φ = 611064.

The previous prime is 612613. The next prime is 612637. The reversal of 612631 is 136216.

612631 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, 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 612631 - 2¹¹ = 610583 is a prime.

It is a super-2 number, since 2×612631² = 750633484322, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 612599 and 612608.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (612637) 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, 325 + ... + 1153.

It is an arithmetic number, because the mean of its divisors is an integer number (153550).

2⁶¹²⁶³¹ is an apocalyptic number.

612631 is a deficient number, since it is larger than the sum of its proper divisors (1569).

612631 is an equidigital number, since it uses as much as digits as its factorization.

612631 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1568.

The product of its digits is 216, while the sum is 19.

The square root of 612631 is about 782.7074804804. The cubic root of 612631 is about 84.9310166948.

Adding to 612631 its reverse (136216), we get a palindrome (748847).

The spelling of 612631 in words is "six hundred twelve thousand, six hundred thirty-one".