78048643 has 4 divisors (see below), whose sum is σ = 78109048. Its totient is φ = 77988240.

The previous prime is 78048631. The next prime is 78048673. The reversal of 78048643 is 34684087.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 34684087 = 29 ⋅1196003.

It is a cyclic number.

It is not a de Polignac number, because 78048643 - 2¹⁷ = 77917571 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 78048596 and 78048605.

It is not an unprimeable number, because it can be changed into a prime (78048613) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 28221 + ... + 30862.

It is an arithmetic number, because the mean of its divisors is an integer number (19527262).

Almost surely, 2^78048643 is an apocalyptic number.

78048643 is a deficient number, since it is larger than the sum of its proper divisors (60405).

78048643 is a wasteful number, since it uses less digits than its factorization.

78048643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 60404.

The product of its (nonzero) digits is 129024, while the sum is 40.

The square root of 78048643 is about 8834.5143047029. The cubic root of 78048643 is about 427.3546680618.

The spelling of 78048643 in words is "seventy-eight million, forty-eight thousand, six hundred forty-three".