78002243 has 4 divisors (see below), whose sum is σ = 85093368. Its totient is φ = 70911120.

The previous prime is 78002237. The next prime is 78002263. The reversal of 78002243 is 34220087.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 78002243 - 2¹⁶ = 77936707 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (78002263) 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 in 3 ways as a sum of consecutive naturals, for example, 3545546 + ... + 3545567.

It is an arithmetic number, because the mean of its divisors is an integer number (21273342).

Almost surely, 2^78002243 is an apocalyptic number.

78002243 is a deficient number, since it is larger than the sum of its proper divisors (7091125).

78002243 is a wasteful number, since it uses less digits than its factorization.

78002243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7091124.

The product of its (nonzero) digits is 2688, while the sum is 26.

The square root of 78002243 is about 8831.8878502843. The cubic root of 78002243 is about 427.2699636747.

The spelling of 78002243 in words is "seventy-eight million, two thousand, two hundred forty-three".