618722417 has 2 divisors, whose sum is σ = 618722418. Its totient is φ = 618722416.

The previous prime is 618722411. The next prime is 618722501. The reversal of 618722417 is 714227816.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 361152016 + 257570401 = 19004^2 + 16049^2 .

It is a cyclic number.

It is not a de Polignac number, because 618722417 - 2⁶ = 618722353 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (618722411) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 309361208 + 309361209.

It is an arithmetic number, because the mean of its divisors is an integer number (309361209).

Almost surely, 2^618722417 is an apocalyptic number.

It is an amenable number.

618722417 is a deficient number, since it is larger than the sum of its proper divisors (1).

618722417 is an equidigital number, since it uses as much as digits as its factorization.

618722417 is an evil number, because the sum of its binary digits is even.

The product of its digits is 37632, while the sum is 38.

The square root of 618722417 is about 24874.1314823252. The cubic root of 618722417 is about 852.1157980140.

The spelling of 618722417 in words is "six hundred eighteen million, seven hundred twenty-two thousand, four hundred seventeen".