78293698589 has 2 divisors, whose sum is σ = 78293698590. Its totient is φ = 78293698588.

The previous prime is 78293698493. The next prime is 78293698591. The reversal of 78293698589 is 98589639287.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 41185455364 + 37108243225 = 202942^2 + 192635^2 .

It is a cyclic number.

It is not a de Polignac number, because 78293698589 - 2³² = 73998731293 is a prime.

It is a super-2 number, since 2×78293698589² (a number of 23 digits) contains 22 as substring.

Together with 78293698591, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (78293691589) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39146849294 + 39146849295.

It is an arithmetic number, because the mean of its divisors is an integer number (39146849295).

Almost surely, 2^78293698589 is an apocalyptic number.

It is an amenable number.

78293698589 is a deficient number, since it is larger than the sum of its proper divisors (1).

78293698589 is an equidigital number, since it uses as much as digits as its factorization.

78293698589 is an evil number, because the sum of its binary digits is even.

The product of its digits is 470292480, while the sum is 74.

The spelling of 78293698589 in words is "seventy-eight billion, two hundred ninety-three million, six hundred ninety-eight thousand, five hundred eighty-nine".