618988139293 has 2 divisors, whose sum is σ = 618988139294. Its totient is φ = 618988139292.

The previous prime is 618988139291. The next prime is 618988139303. The reversal of 618988139293 is 392931889816.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 581372700484 + 37615438809 = 762478^2 + 193947^2 .

It is a cyclic number.

It is not a de Polignac number, because 618988139293 - 2¹ = 618988139291 is a prime.

Together with 618988139291, 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 (618988139291) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 309494069646 + 309494069647.

It is an arithmetic number, because the mean of its divisors is an integer number (309494069647).

Almost surely, 2^618988139293 is an apocalyptic number.

It is an amenable number.

618988139293 is a deficient number, since it is larger than the sum of its proper divisors (1).

618988139293 is an equidigital number, since it uses as much as digits as its factorization.

618988139293 is an evil number, because the sum of its binary digits is even.

The product of its digits is 40310784, while the sum is 67.

The spelling of 618988139293 in words is "six hundred eighteen billion, nine hundred eighty-eight million, one hundred thirty-nine thousand, two hundred ninety-three".