78330361 has 2 divisors, whose sum is σ = 78330362. Its totient is φ = 78330360.

The previous prime is 78330319. The next prime is 78330403. The reversal of 78330361 is 16303387.

It is a balanced prime because it is at equal distance from previous prime (78330319) and next prime (78330403).

It can be written as a sum of positive squares in only one way, i.e., 74926336 + 3404025 = 8656^2 + 1845^2 .

It is a cyclic number.

It is not a de Polignac number, because 78330361 - 2¹³ = 78322169 is a prime.

It is a super-2 number, since 2×78330361² = 12271290908780642, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (78336361) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39165180 + 39165181.

It is an arithmetic number, because the mean of its divisors is an integer number (39165181).

Almost surely, 2^78330361 is an apocalyptic number.

It is an amenable number.

78330361 is a deficient number, since it is larger than the sum of its proper divisors (1).

78330361 is an equidigital number, since it uses as much as digits as its factorization.

78330361 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 9072, while the sum is 31.

The square root of 78330361 is about 8850.4441131505. Note that the first 3 decimals coincide. The cubic root of 78330361 is about 427.8682321391.

The spelling of 78330361 in words is "seventy-eight million, three hundred thirty thousand, three hundred sixty-one".