78744271 has 4 divisors (see below), whose sum is σ = 78762232. Its totient is φ = 78726312.

The previous prime is 78744241. The next prime is 78744283. The reversal of 78744271 is 17244787.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 17244787 = 7 ⋅2463541.

It is a cyclic number.

It is not a de Polignac number, because 78744271 - 2¹³ = 78736079 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78744241) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2425 + ... + 12781.

It is an arithmetic number, because the mean of its divisors is an integer number (19690558).

Almost surely, 2^78744271 is an apocalyptic number.

78744271 is a deficient number, since it is larger than the sum of its proper divisors (17961).

78744271 is a wasteful number, since it uses less digits than its factorization.

78744271 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17960.

The product of its digits is 87808, while the sum is 40.

The square root of 78744271 is about 8873.7968761968. The cubic root of 78744271 is about 428.6205496766.

The spelling of 78744271 in words is "seventy-eight million, seven hundred forty-four thousand, two hundred seventy-one".