71794945 has 4 divisors (see below), whose sum is σ = 86153940. Its totient is φ = 57435952.

The previous prime is 71794909. The next prime is 71794949. The reversal of 71794945 is 54949717.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 54949717 = 41 ⋅1340237.

It can be written as a sum of positive squares in 2 ways, for example, as 32444416 + 39350529 = 5696^2 + 6273^2 .

It is a cyclic number.

It is not a de Polignac number, because 71794945 - 2⁹ = 71794433 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 71794895 and 71794904.

It is not an unprimeable number, because it can be changed into a prime (71794949) 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, 7179490 + ... + 7179499.

It is an arithmetic number, because the mean of its divisors is an integer number (21538485).

Almost surely, 2^71794945 is an apocalyptic number.

It is an amenable number.

71794945 is a deficient number, since it is larger than the sum of its proper divisors (14358995).

71794945 is a wasteful number, since it uses less digits than its factorization.

71794945 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14358994.

The product of its digits is 317520, while the sum is 46.

The square root of 71794945 is about 8473.1897771736. The cubic root of 71794945 is about 415.6214524355.

The spelling of 71794945 in words is "seventy-one million, seven hundred ninety-four thousand, nine hundred forty-five".