78347271 has 8 divisors (see below), whose sum is σ = 110607984. Its totient is φ = 49159040.

The previous prime is 78347267. The next prime is 78347309. The reversal of 78347271 is 17274387.

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 78347271 - 2² = 78347267 is a prime.

It is a super-2 number, since 2×78347271² = 12276589746294882, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78347231) 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, 768060 + ... + 768161.

It is an arithmetic number, because the mean of its divisors is an integer number (13825998).

Almost surely, 2^78347271 is an apocalyptic number.

78347271 is a deficient number, since it is larger than the sum of its proper divisors (32260713).

78347271 is a wasteful number, since it uses less digits than its factorization.

78347271 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1536241.

The product of its digits is 65856, while the sum is 39.

The square root of 78347271 is about 8851.3993808889. The cubic root of 78347271 is about 427.8990193976.

The spelling of 78347271 in words is "seventy-eight million, three hundred forty-seven thousand, two hundred seventy-one".