78951271 has 4 divisors (see below), whose sum is σ = 90230032. Its totient is φ = 67672512.

The previous prime is 78951269. The next prime is 78951283. The reversal of 78951271 is 17215987.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 17215987 = 863 ⋅19949.

It is a cyclic number.

It is not a de Polignac number, because 78951271 - 2¹ = 78951269 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 (78951221) 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, 5639370 + ... + 5639383.

It is an arithmetic number, because the mean of its divisors is an integer number (22557508).

Almost surely, 2^78951271 is an apocalyptic number.

78951271 is a deficient number, since it is larger than the sum of its proper divisors (11278761).

78951271 is a wasteful number, since it uses less digits than its factorization.

78951271 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11278760.

The product of its digits is 35280, while the sum is 40.

The square root of 78951271 is about 8885.4527740572. The cubic root of 78951271 is about 428.9958016191.

The spelling of 78951271 in words is "seventy-eight million, nine hundred fifty-one thousand, two hundred seventy-one".