618812101 has 2 divisors, whose sum is σ = 618812102. Its totient is φ = 618812100.

The previous prime is 618812099. The next prime is 618812141. The reversal of 618812101 is 101218816.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 612612001 + 6200100 = 24751^2 + 2490^2 .

It is a cyclic number.

It is not a de Polignac number, because 618812101 - 2¹ = 618812099 is a prime.

Together with 618812099, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 618812101.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (618812141) 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, 309406050 + 309406051.

It is an arithmetic number, because the mean of its divisors is an integer number (309406051).

Almost surely, 2^618812101 is an apocalyptic number.

It is an amenable number.

618812101 is a deficient number, since it is larger than the sum of its proper divisors (1).

618812101 is an equidigital number, since it uses as much as digits as its factorization.

618812101 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 768, while the sum is 28.

The square root of 618812101 is about 24875.9341734135. The cubic root of 618812101 is about 852.1569675051.

The spelling of 618812101 in words is "six hundred eighteen million, eight hundred twelve thousand, one hundred one".