78303829 has 2 divisors, whose sum is σ = 78303830. Its totient is φ = 78303828.

The previous prime is 78303811. The next prime is 78303839. The reversal of 78303829 is 92830387.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 45927729 + 32376100 = 6777^2 + 5690^2 .

It is a cyclic number.

It is not a de Polignac number, because 78303829 - 2¹¹ = 78301781 is a prime.

It is a super-2 number, since 2×78303829² = 12262979272122482, which contains 22 as substring.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 78303791 and 78303800.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (78303839) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39151914 + 39151915.

It is an arithmetic number, because the mean of its divisors is an integer number (39151915).

Almost surely, 2^78303829 is an apocalyptic number.

It is an amenable number.

78303829 is a deficient number, since it is larger than the sum of its proper divisors (1).

78303829 is an equidigital number, since it uses as much as digits as its factorization.

78303829 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 72576, while the sum is 40.

The square root of 78303829 is about 8848.9450783695. The cubic root of 78303829 is about 427.8199176168.

The spelling of 78303829 in words is "seventy-eight million, three hundred three thousand, eight hundred twenty-nine".