78360049 has 2 divisors, whose sum is σ = 78360050. Its totient is φ = 78360048.

The previous prime is 78360019. The next prime is 78360053. The reversal of 78360049 is 94006387.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 53290000 + 25070049 = 7300^2 + 5007^2 .

It is an emirp because it is prime and its reverse (94006387) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 78360049 - 2¹³ = 78351857 is a prime.

It is a super-2 number, since 2×78360049² = 12280594558564802, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (78360019) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39180024 + 39180025.

It is an arithmetic number, because the mean of its divisors is an integer number (39180025).

Almost surely, 2^78360049 is an apocalyptic number.

It is an amenable number.

78360049 is a deficient number, since it is larger than the sum of its proper divisors (1).

78360049 is an equidigital number, since it uses as much as digits as its factorization.

78360049 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 36288, while the sum is 37.

The square root of 78360049 is about 8852.1211582309. The cubic root of 78360049 is about 427.9222807755.

The spelling of 78360049 in words is "seventy-eight million, three hundred sixty thousand, forty-nine".