618131 has 2 divisors, whose sum is σ = 618132. Its totient is φ = 618130.

The previous prime is 618119. The next prime is 618161. The reversal of 618131 is 131816.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 618131 - 2¹⁰ = 617107 is a prime.

It is a super-2 number, since 2×618131² = 764171866322, which contains 22 as substring.

It is a Chen prime.

It is an Ulam number.

It is not a weakly prime, because it can be changed into another prime (618161) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 309065 + 309066.

It is an arithmetic number, because the mean of its divisors is an integer number (309066).

2⁶¹⁸¹³¹ is an apocalyptic number.

618131 is a deficient number, since it is larger than the sum of its proper divisors (1).

618131 is an equidigital number, since it uses as much as digits as its factorization.

618131 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 144, while the sum is 20.

The square root of 618131 is about 786.2130754446. The cubic root of 618131 is about 85.1844208034.

Adding to 618131 its reverse (131816), we get a palindrome (749947).

It can be divided in two parts, 61 and 8131, that added together give a 13-th power (8192 = 2¹³).

The spelling of 618131 in words is "six hundred eighteen thousand, one hundred thirty-one".