71896649 has 4 divisors (see below), whose sum is σ = 78432720. Its totient is φ = 65360580.

The previous prime is 71896609. The next prime is 71896667. The reversal of 71896649 is 94669817.

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.

It is a cyclic number.

It is not a de Polignac number, because 71896649 - 2⁸ = 71896393 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 71896597 and 71896606.

It is not an unprimeable number, because it can be changed into a prime (71896609) 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, 3268019 + ... + 3268040.

It is an arithmetic number, because the mean of its divisors is an integer number (19608180).

Almost surely, 2^71896649 is an apocalyptic number.

It is an amenable number.

71896649 is a deficient number, since it is larger than the sum of its proper divisors (6536071).

71896649 is a wasteful number, since it uses less digits than its factorization.

71896649 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6536070.

The product of its digits is 653184, while the sum is 50.

The square root of 71896649 is about 8479.1891711413. The cubic root of 71896649 is about 415.8176148996.

The spelling of 71896649 in words is "seventy-one million, eight hundred ninety-six thousand, six hundred forty-nine".