71232649 has 4 divisors (see below), whose sum is σ = 71793664. Its totient is φ = 70671636.

The previous prime is 71232643. The next prime is 71232677. The reversal of 71232649 is 94623217.

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 71232649 - 2⁵ = 71232617 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (71232643) 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, 280317 + ... + 280570.

It is an arithmetic number, because the mean of its divisors is an integer number (17948416).

Almost surely, 2^71232649 is an apocalyptic number.

It is an amenable number.

71232649 is a deficient number, since it is larger than the sum of its proper divisors (561015).

71232649 is a wasteful number, since it uses less digits than its factorization.

71232649 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 561014.

The product of its digits is 18144, while the sum is 34.

The square root of 71232649 is about 8439.9436609494. The cubic root of 71232649 is about 414.5335621696.

The spelling of 71232649 in words is "seventy-one million, two hundred thirty-two thousand, six hundred forty-nine".