78899787341 has 2 divisors, whose sum is σ = 78899787342. Its totient is φ = 78899787340.

The previous prime is 78899787319. The next prime is 78899787347. The reversal of 78899787341 is 14378799887.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 51519466441 + 27380320900 = 226979^2 + 165470^2 .

It is an emirp because it is prime and its reverse (14378799887) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-78899787341 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (78899787347) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39449893670 + 39449893671.

It is an arithmetic number, because the mean of its divisors is an integer number (39449893671).

Almost surely, 2^78899787341 is an apocalyptic number.

It is an amenable number.

78899787341 is a deficient number, since it is larger than the sum of its proper divisors (1).

78899787341 is an equidigital number, since it uses as much as digits as its factorization.

78899787341 is an evil number, because the sum of its binary digits is even.

The product of its digits is 170698752, while the sum is 71.

The spelling of 78899787341 in words is "seventy-eight billion, eight hundred ninety-nine million, seven hundred eighty-seven thousand, three hundred forty-one".