78953171 has 8 divisors (see below), whose sum is σ = 86277744. Its totient is φ = 71653120.

The previous prime is 78953159. The next prime is 78953179. The reversal of 78953171 is 17135987.

78953171 = T₁₆₅ + T₁₆₆ + ... + T₇₈₁.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a de Polignac number, because none of the positive numbers 2^k-78953171 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (78953179) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 971 + ... + 12603.

It is an arithmetic number, because the mean of its divisors is an integer number (10784718).

Almost surely, 2^78953171 is an apocalyptic number.

78953171 is a deficient number, since it is larger than the sum of its proper divisors (7324573).

78953171 is a wasteful number, since it uses less digits than its factorization.

78953171 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12261.

The product of its digits is 52920, while the sum is 41.

The square root of 78953171 is about 8885.5596897438. The cubic root of 78953171 is about 428.9992429210. Note that the first 3 decimals are identical.

The spelling of 78953171 in words is "seventy-eight million, nine hundred fifty-three thousand, one hundred seventy-one".