78736471 has 8 divisors (see below), whose sum is σ = 85971600. Its totient is φ = 71514240.

The previous prime is 78736451. The next prime is 78736487. The reversal of 78736471 is 17463787.

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 78736471 - 2²³ = 70347863 is a prime.

It is a super-3 number, since 3×78736471³ (a number of 25 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78736451) 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, 13215 + ... + 18223.

It is an arithmetic number, because the mean of its divisors is an integer number (10746450).

Almost surely, 2^78736471 is an apocalyptic number.

78736471 is a deficient number, since it is larger than the sum of its proper divisors (7235129).

78736471 is a wasteful number, since it uses less digits than its factorization.

78736471 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6449.

The product of its digits is 197568, while the sum is 43.

The square root of 78736471 is about 8873.3573691135. The cubic root of 78736471 is about 428.6063968981.

The spelling of 78736471 in words is "seventy-eight million, seven hundred thirty-six thousand, four hundred seventy-one".