78055293 has 4 divisors (see below), whose sum is σ = 104073728. Its totient is φ = 52036860.

The previous prime is 78055283. The next prime is 78055301. The reversal of 78055293 is 39255087.

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 not a de Polignac number, because 78055293 - 2²⁰ = 77006717 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78055223) 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, 13009213 + ... + 13009218.

It is an arithmetic number, because the mean of its divisors is an integer number (26018432).

Almost surely, 2^78055293 is an apocalyptic number.

It is an amenable number.

78055293 is a deficient number, since it is larger than the sum of its proper divisors (26018435).

78055293 is a wasteful number, since it uses less digits than its factorization.

78055293 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26018434.

The product of its (nonzero) digits is 75600, while the sum is 39.

The square root of 78055293 is about 8834.8906614627. The cubic root of 78055293 is about 427.3668050562.

The spelling of 78055293 in words is "seventy-eight million, fifty-five thousand, two hundred ninety-three".