71075649 has 4 divisors (see below), whose sum is σ = 94767536. Its totient is φ = 47383764.

The previous prime is 71075621. The next prime is 71075699. The reversal of 71075649 is 94657017.

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 not a de Polignac number, because 71075649 - 2⁵ = 71075617 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (71075699) 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, 11845939 + ... + 11845944.

It is an arithmetic number, because the mean of its divisors is an integer number (23691884).

Almost surely, 2^71075649 is an apocalyptic number.

It is an amenable number.

71075649 is a deficient number, since it is larger than the sum of its proper divisors (23691887).

71075649 is a wasteful number, since it uses less digits than its factorization.

71075649 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23691886.

The product of its (nonzero) digits is 52920, while the sum is 39.

The square root of 71075649 is about 8430.6375203777. The cubic root of 71075649 is about 414.2287878693.

The spelling of 71075649 in words is "seventy-one million, seventy-five thousand, six hundred forty-nine".