71948449 has 4 divisors (see below), whose sum is σ = 74429460. Its totient is φ = 69467440.

The previous prime is 71948447. The next prime is 71948453. The reversal of 71948449 is 94484917.

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 18190225 + 53758224 = 4265^2 + 7332^2 .

It is a cyclic number.

It is not a de Polignac number, because 71948449 - 2¹ = 71948447 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 71948399 and 71948408.

It is not an unprimeable number, because it can be changed into a prime (71948441) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1240462 + ... + 1240519.

It is an arithmetic number, because the mean of its divisors is an integer number (18607365).

Almost surely, 2^71948449 is an apocalyptic number.

It is an amenable number.

71948449 is a deficient number, since it is larger than the sum of its proper divisors (2481011).

71948449 is a wasteful number, since it uses less digits than its factorization.

71948449 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2481010.

The product of its digits is 290304, while the sum is 46.

The square root of 71948449 is about 8482.2431585047. The cubic root of 71948449 is about 415.9174534963.

The spelling of 71948449 in words is "seventy-one million, nine hundred forty-eight thousand, four hundred forty-nine".