71478433 has 4 divisors (see below), whose sum is σ = 76976788. Its totient is φ = 65980080.

The previous prime is 71478409. The next prime is 71478439. The reversal of 71478433 is 33487417.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 20684304 + 50794129 = 4548^2 + 7127^2 .

It is a cyclic number.

It is not a de Polignac number, because 71478433 - 2⁵ = 71478401 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 71478392 and 71478401.

It is not an unprimeable number, because it can be changed into a prime (71478439) 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, 2749158 + ... + 2749183.

It is an arithmetic number, because the mean of its divisors is an integer number (19244197).

Almost surely, 2^71478433 is an apocalyptic number.

It is an amenable number.

71478433 is a deficient number, since it is larger than the sum of its proper divisors (5498355).

71478433 is a wasteful number, since it uses less digits than its factorization.

71478433 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5498354.

The product of its digits is 56448, while the sum is 37.

The square root of 71478433 is about 8454.4918830170. The cubic root of 71478433 is about 415.0097892886.

The spelling of 71478433 in words is "seventy-one million, four hundred seventy-eight thousand, four hundred thirty-three".