78041893 has 4 divisors (see below), whose sum is σ = 78068800. Its totient is φ = 78014988.

The previous prime is 78041867. The next prime is 78041903. The reversal of 78041893 is 39814087.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-78041893 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78044893) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8493 + ... + 15106.

It is an arithmetic number, because the mean of its divisors is an integer number (19517200).

Almost surely, 2^78041893 is an apocalyptic number.

It is an amenable number.

78041893 is a deficient number, since it is larger than the sum of its proper divisors (26907).

78041893 is a wasteful number, since it uses less digits than its factorization.

78041893 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26906.

The product of its (nonzero) digits is 48384, while the sum is 40.

The square root of 78041893 is about 8834.1322720457. The cubic root of 78041893 is about 427.3423478511.

The spelling of 78041893 in words is "seventy-eight million, forty-one thousand, eight hundred ninety-three".