78578853 has 4 divisors (see below), whose sum is σ = 104771808. Its totient is φ = 52385900.

The previous prime is 78578809. The next prime is 78578867. The reversal of 78578853 is 35887587.

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 not a de Polignac number, because 78578853 - 2⁶ = 78578789 is a prime.

It is a super-2 number, since 2×78578853² = 12349272277591218, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 78578796 and 78578805.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78578653) 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, 13096473 + ... + 13096478.

It is an arithmetic number, because the mean of its divisors is an integer number (26192952).

Almost surely, 2^78578853 is an apocalyptic number.

It is an amenable number.

78578853 is a deficient number, since it is larger than the sum of its proper divisors (26192955).

78578853 is a wasteful number, since it uses less digits than its factorization.

78578853 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26192954.

The product of its digits is 1881600, while the sum is 51.

The square root of 78578853 is about 8864.4713886390. The cubic root of 78578853 is about 428.3202050343.

The spelling of 78578853 in words is "seventy-eight million, five hundred seventy-eight thousand, eight hundred fifty-three".