71648849 has 4 divisors (see below), whose sum is σ = 71732736. Its totient is φ = 71564964.

The previous prime is 71648839. The next prime is 71648851. The reversal of 71648849 is 94884617.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 94884617 = 43 ⋅2206619.

It is a cyclic number.

It is not a de Polignac number, because 71648849 - 2¹⁶ = 71583313 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (71648809) 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, 40649 + ... + 42374.

It is an arithmetic number, because the mean of its divisors is an integer number (17933184).

Almost surely, 2^71648849 is an apocalyptic number.

It is an amenable number.

71648849 is a deficient number, since it is larger than the sum of its proper divisors (83887).

71648849 is an equidigital number, since it uses as much as digits as its factorization.

71648849 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 83886.

The product of its digits is 387072, while the sum is 47.

The square root of 71648849 is about 8464.5643124735. The cubic root of 71648849 is about 415.3393440629.

The spelling of 71648849 in words is "seventy-one million, six hundred forty-eight thousand, eight hundred forty-nine".