71946845 has 8 divisors (see below), whose sum is σ = 87191640. Its totient is φ = 56987200.

The previous prime is 71946827. The next prime is 71946857. The reversal of 71946845 is 54864917.

It can be written as a sum of positive squares in 4 ways, for example, as 19035769 + 52911076 = 4363^2 + 7274^2 .

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

It is not a de Polignac number, because 71946845 - 2¹⁴ = 71930461 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 71946796 and 71946805.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 70730 + ... + 71739.

It is an arithmetic number, because the mean of its divisors is an integer number (10898955).

Almost surely, 2^71946845 is an apocalyptic number.

It is an amenable number.

71946845 is a deficient number, since it is larger than the sum of its proper divisors (15244795).

71946845 is a wasteful number, since it uses less digits than its factorization.

71946845 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 142575.

The product of its digits is 241920, while the sum is 44.

The square root of 71946845 is about 8482.1486075168. The cubic root of 71946845 is about 415.9143626882.

The spelling of 71946845 in words is "seventy-one million, nine hundred forty-six thousand, eight hundred forty-five".