71478393 has 8 divisors (see below), whose sum is σ = 108919488. Its totient is φ = 40844784.

The previous prime is 71478391. The next prime is 71478401. The reversal of 71478393 is 39387417.

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

It is not a de Polignac number, because 71478393 - 2¹ = 71478391 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (71478391) 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, 1701846 + ... + 1701887.

It is an arithmetic number, because the mean of its divisors is an integer number (13614936).

Almost surely, 2^71478393 is an apocalyptic number.

It is an amenable number.

71478393 is a deficient number, since it is larger than the sum of its proper divisors (37441095).

71478393 is a wasteful number, since it uses less digits than its factorization.

71478393 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3403743.

The product of its digits is 127008, while the sum is 42.

The square root of 71478393 is about 8454.4895174103. The cubic root of 71478393 is about 415.0097118741.

The spelling of 71478393 in words is "seventy-one million, four hundred seventy-eight thousand, three hundred ninety-three".