78303941 has 2 divisors, whose sum is σ = 78303942. Its totient is φ = 78303940.

The previous prime is 78303889. The next prime is 78303971. The reversal of 78303941 is 14930387.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 60062500 + 18241441 = 7750^2 + 4271^2 .

It is an emirp because it is prime and its reverse (14930387) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-78303941 is a prime.

It is a super-2 number, since 2×78303941² = 12263014352262962, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is equal to p_4576247 and since 78303941 and 4576247 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (78303971) 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, 39151970 + 39151971.

It is an arithmetic number, because the mean of its divisors is an integer number (39151971).

Almost surely, 2^78303941 is an apocalyptic number.

It is an amenable number.

78303941 is a deficient number, since it is larger than the sum of its proper divisors (1).

78303941 is an equidigital number, since it uses as much as digits as its factorization.

78303941 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 18144, while the sum is 35.

The square root of 78303941 is about 8848.9514068052. The cubic root of 78303941 is about 427.8201215907.

The spelling of 78303941 in words is "seventy-eight million, three hundred three thousand, nine hundred forty-one".