78930471 has 4 divisors (see below), whose sum is σ = 105240632. Its totient is φ = 52620312.

The previous prime is 78930469. The next prime is 78930479. The reversal of 78930471 is 17403987.

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

It is not a de Polignac number, because 78930471 - 2¹ = 78930469 is a prime.

It is a super-3 number, since 3×78930471³ (a number of 25 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78930479) 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, 13155076 + ... + 13155081.

It is an arithmetic number, because the mean of its divisors is an integer number (26310158).

Almost surely, 2^78930471 is an apocalyptic number.

78930471 is a deficient number, since it is larger than the sum of its proper divisors (26310161).

78930471 is a wasteful number, since it uses less digits than its factorization.

78930471 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26310160.

The product of its (nonzero) digits is 42336, while the sum is 39.

The square root of 78930471 is about 8884.2822445035. The cubic root of 78930471 is about 428.9581248078.

It can be divided in two parts, 78930 and 471, that added together give a triangular number (79401 = T₃₉₈).

The spelling of 78930471 in words is "seventy-eight million, nine hundred thirty thousand, four hundred seventy-one".