78625471 has 4 divisors (see below), whose sum is σ = 79732944. Its totient is φ = 77518000.

The previous prime is 78625451. The next prime is 78625487. The reversal of 78625471 is 17452687.

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 78625471 - 2¹⁷ = 78494399 is a prime.

It is a super-3 number, since 3×78625471³ (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 (78625411) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 553630 + ... + 553771.

It is an arithmetic number, because the mean of its divisors is an integer number (19933236).

Almost surely, 2^78625471 is an apocalyptic number.

78625471 is a gapful number since it is divisible by the number (71) formed by its first and last digit.

78625471 is a deficient number, since it is larger than the sum of its proper divisors (1107473).

78625471 is a wasteful number, since it uses less digits than its factorization.

78625471 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1107472.

The product of its digits is 94080, while the sum is 40.

The square root of 78625471 is about 8867.1004843748. The cubic root of 78625471 is about 428.4048906005.

The spelling of 78625471 in words is "seventy-eight million, six hundred twenty-five thousand, four hundred seventy-one".