78452971 has 8 divisors (see below), whose sum is σ = 81327488. Its totient is φ = 75600000.

The previous prime is 78452963. The next prime is 78452993. The reversal of 78452971 is 17925487.

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 78452971 - 2³ = 78452963 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (78452911) 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, 2221 + ... + 12721.

It is an arithmetic number, because the mean of its divisors is an integer number (10165936).

Almost surely, 2^78452971 is an apocalyptic number.

78452971 is a deficient number, since it is larger than the sum of its proper divisors (2874517).

78452971 is a wasteful number, since it uses less digits than its factorization.

78452971 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10773.

The product of its digits is 141120, while the sum is 43.

The square root of 78452971 is about 8857.3681757055. The cubic root of 78452971 is about 428.0913622034.

It can be divided in two parts, 7845 and 2971, that added together give a square (10816 = 104²).

The spelling of 78452971 in words is "seventy-eight million, four hundred fifty-two thousand, nine hundred seventy-one".