618437 has 2 divisors, whose sum is σ = 618438. Its totient is φ = 618436.

The previous prime is 618421. The next prime is 618439. The reversal of 618437 is 734816.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 519841 + 98596 = 721^2 + 314^2 .

It is a cyclic number.

It is not a de Polignac number, because 618437 - 2⁴ = 618421 is a prime.

Together with 618439, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (618439) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 309218 + 309219.

It is an arithmetic number, because the mean of its divisors is an integer number (309219).

2⁶¹⁸⁴³⁷ is an apocalyptic number.

It is an amenable number.

618437 is a deficient number, since it is larger than the sum of its proper divisors (1).

618437 is an equidigital number, since it uses as much as digits as its factorization.

618437 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4032, while the sum is 29.

The square root of 618437 is about 786.4076551001. The cubic root of 618437 is about 85.1984750695.

The spelling of 618437 in words is "six hundred eighteen thousand, four hundred thirty-seven".