78953863 has 4 divisors (see below), whose sum is σ = 81676440. Its totient is φ = 76231288.

The previous prime is 78953851. The next prime is 78953867. The reversal of 78953863 is 36835987.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 78953863 - 2⁹ = 78953351 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 (78953867) 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, 1361245 + ... + 1361302.

It is an arithmetic number, because the mean of its divisors is an integer number (20419110).

Almost surely, 2^78953863 is an apocalyptic number.

78953863 is a deficient number, since it is larger than the sum of its proper divisors (2722577).

78953863 is a wasteful number, since it uses less digits than its factorization.

78953863 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2722576.

The product of its digits is 1088640, while the sum is 49.

The square root of 78953863 is about 8885.5986292427. The cubic root of 78953863 is about 429.0004962657. Note that the first 3 decimals are identical.

The spelling of 78953863 in words is "seventy-eight million, nine hundred fifty-three thousand, eight hundred sixty-three".