78451471 has 8 divisors (see below), whose sum is σ = 89742240. Its totient is φ = 67181568.

The previous prime is 78451469. The next prime is 78451553. The reversal of 78451471 is 17415487.

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

It is a cyclic number.

It is not a de Polignac number, because 78451471 - 2¹ = 78451469 is a prime.

It is a super-3 number, since 3×78451471³ (a number of 25 digits) contains 333 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 78451471.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78451271) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3915 + ... + 13123.

It is an arithmetic number, because the mean of its divisors is an integer number (11217780).

Almost surely, 2^78451471 is an apocalyptic number.

78451471 is a deficient number, since it is larger than the sum of its proper divisors (11290769).

78451471 is a wasteful number, since it uses less digits than its factorization.

78451471 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10433.

The product of its digits is 31360, while the sum is 37.

The square root of 78451471 is about 8857.2835000354. The cubic root of 78451471 is about 428.0886338549.

It can be divided in two parts, 7845 and 1471, that added together give a triangular number (9316 = T₁₃₆).

The spelling of 78451471 in words is "seventy-eight million, four hundred fifty-one thousand, four hundred seventy-one".