618903823 has 2 divisors, whose sum is σ = 618903824. Its totient is φ = 618903822.

The previous prime is 618903821. The next prime is 618903829. The reversal of 618903823 is 328309816.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 618903823 - 2¹ = 618903821 is a prime.

Together with 618903821, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (618903821) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 309451911 + 309451912.

It is an arithmetic number, because the mean of its divisors is an integer number (309451912).

Almost surely, 2^618903823 is an apocalyptic number.

618903823 is a deficient number, since it is larger than the sum of its proper divisors (1).

618903823 is an equidigital number, since it uses as much as digits as its factorization.

618903823 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 62208, while the sum is 40.

The square root of 618903823 is about 24877.7776941591. Note that the first 3 decimals coincide. The cubic root of 618903823 is about 852.1990684270.

The spelling of 618903823 in words is "six hundred eighteen million, nine hundred three thousand, eight hundred twenty-three".