78971474 has 8 divisors (see below), whose sum is σ = 118918908. Its totient is φ = 39331840.

The previous prime is 78971449. The next prime is 78971479. The reversal of 78971474 is 47417987.

It can be written as a sum of positive squares in 2 ways, for example, as 63091249 + 15880225 = 7943^2 + 3985^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (78971479) 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, 76307 + ... + 77334.

Almost surely, 2^78971474 is an apocalyptic number.

78971474 is a deficient number, since it is larger than the sum of its proper divisors (39947434).

78971474 is a wasteful number, since it uses less digits than its factorization.

78971474 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 153900.

The product of its digits is 395136, while the sum is 47.

The square root of 78971474 is about 8886.5895595555. The cubic root of 78971474 is about 429.0323906986.

The spelling of 78971474 in words is "seventy-eight million, nine hundred seventy-one thousand, four hundred seventy-four".