78298249829 has 2 divisors, whose sum is σ = 78298249830. Its totient is φ = 78298249828.

The previous prime is 78298249789. The next prime is 78298249831. The reversal of 78298249829 is 92894289287.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 44849497729 + 33448752100 = 211777^2 + 182890^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-78298249829 is a prime.

It is a super-2 number, since 2×78298249829² (a number of 23 digits) contains 22 as substring.

Together with 78298249831, 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 (78298249129) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39149124914 + 39149124915.

It is an arithmetic number, because the mean of its divisors is an integer number (39149124915).

Almost surely, 2^78298249829 is an apocalyptic number.

It is an amenable number.

78298249829 is a deficient number, since it is larger than the sum of its proper divisors (1).

78298249829 is an equidigital number, since it uses as much as digits as its factorization.

78298249829 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 83607552, while the sum is 68.

The spelling of 78298249829 in words is "seventy-eight billion, two hundred ninety-eight million, two hundred forty-nine thousand, eight hundred twenty-nine".