78629471 has 4 divisors (see below), whose sum is σ = 83254752. Its totient is φ = 74004192.

The previous prime is 78629417. The next prime is 78629483. The reversal of 78629471 is 17492687.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-78629471 is a prime.

It is a super-3 number, since 3×78629471³ (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 (78629401) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2312615 + ... + 2312648.

It is an arithmetic number, because the mean of its divisors is an integer number (20813688).

Almost surely, 2^78629471 is an apocalyptic number.

78629471 is a deficient number, since it is larger than the sum of its proper divisors (4625281).

78629471 is a wasteful number, since it uses less digits than its factorization.

78629471 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4625280.

The product of its digits is 169344, while the sum is 44.

The square root of 78629471 is about 8867.3260343804. The cubic root of 78629471 is about 428.4121553816.

The spelling of 78629471 in words is "seventy-eight million, six hundred twenty-nine thousand, four hundred seventy-one".