618400487 has 2 divisors, whose sum is σ = 618400488. Its totient is φ = 618400486.

The previous prime is 618400459. The next prime is 618400513. The reversal of 618400487 is 784004816.

618400487 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 618400487 - 2¹² = 618396391 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 618400487.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (618402487) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 309200243 + 309200244.

It is an arithmetic number, because the mean of its divisors is an integer number (309200244).

Almost surely, 2^618400487 is an apocalyptic number.

618400487 is a deficient number, since it is larger than the sum of its proper divisors (1).

618400487 is an equidigital number, since it uses as much as digits as its factorization.

618400487 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 43008, while the sum is 38.

The square root of 618400487 is about 24867.6594596275. The cubic root of 618400487 is about 851.9679830850.

The spelling of 618400487 in words is "six hundred eighteen million, four hundred thousand, four hundred eighty-seven".