78855297 has 4 divisors (see below), whose sum is σ = 105140400. Its totient is φ = 52570196.

The previous prime is 78855241. The next prime is 78855307. The reversal of 78855297 is 79255887.

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 78855297 - 2⁶ = 78855233 is a prime.

It is not an unprimeable number, because it can be changed into a prime (78857297) 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, 13142547 + ... + 13142552.

It is an arithmetic number, because the mean of its divisors is an integer number (26285100).

Almost surely, 2^78855297 is an apocalyptic number.

It is an amenable number.

78855297 is a deficient number, since it is larger than the sum of its proper divisors (26285103).

78855297 is a wasteful number, since it uses less digits than its factorization.

78855297 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26285102.

The product of its digits is 1411200, while the sum is 51.

The square root of 78855297 is about 8880.0505066131. The cubic root of 78855297 is about 428.8219005235.

The spelling of 78855297 in words is "seventy-eight million, eight hundred fifty-five thousand, two hundred ninety-seven".