78941377 has 2 divisors, whose sum is σ = 78941378. Its totient is φ = 78941376.

The previous prime is 78941311. The next prime is 78941437. The reversal of 78941377 is 77314987.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 78570496 + 370881 = 8864^2 + 609^2 .

It is an emirp because it is prime and its reverse (77314987) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-78941377 is a prime.

It is a super-2 number, since 2×78941377² = 12463482005312258, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (78941677) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39470688 + 39470689.

It is an arithmetic number, because the mean of its divisors is an integer number (39470689).

Almost surely, 2^78941377 is an apocalyptic number.

It is an amenable number.

78941377 is a deficient number, since it is larger than the sum of its proper divisors (1).

78941377 is an equidigital number, since it uses as much as digits as its factorization.

78941377 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 296352, while the sum is 46.

The square root of 78941377 is about 8884.8960038933. The cubic root of 78941377 is about 428.9778805997.

The spelling of 78941377 in words is "seventy-eight million, nine hundred forty-one thousand, three hundred seventy-seven".