618407 has 2 divisors, whose sum is σ = 618408. Its totient is φ = 618406.

The previous prime is 618377. The next prime is 618413. The reversal of 618407 is 704816.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 618407 - 2¹⁸ = 356263 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (618437) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 309203 + 309204.

It is an arithmetic number, because the mean of its divisors is an integer number (309204).

2⁶¹⁸⁴⁰⁷ is an apocalyptic number.

618407 is a deficient number, since it is larger than the sum of its proper divisors (1).

618407 is an equidigital number, since it uses as much as digits as its factorization.

618407 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1344, while the sum is 26.

The square root of 618407 is about 786.3885807920. The cubic root of 618407 is about 85.1970974053.

The spelling of 618407 in words is "six hundred eighteen thousand, four hundred seven".