618497279 has 2 divisors, whose sum is σ = 618497280. Its totient is φ = 618497278.

The previous prime is 618497267. The next prime is 618497293. The reversal of 618497279 is 972794816.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-618497279 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 618497279.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (618497219) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 309248639 + 309248640.

It is an arithmetic number, because the mean of its divisors is an integer number (309248640).

Almost surely, 2^618497279 is an apocalyptic number.

618497279 is a deficient number, since it is larger than the sum of its proper divisors (1).

618497279 is an equidigital number, since it uses as much as digits as its factorization.

618497279 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1524096, while the sum is 53.

The square root of 618497279 is about 24869.6055256210. The cubic root of 618497279 is about 852.0124307553.

The spelling of 618497279 in words is "six hundred eighteen million, four hundred ninety-seven thousand, two hundred seventy-nine".