71443601 has 4 divisors (see below), whose sum is σ = 71989104. Its totient is φ = 70898100.

The previous prime is 71443583. The next prime is 71443609. The reversal of 71443601 is 10634417.

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 a de Polignac number, because none of the positive numbers 2^k-71443601 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (71443609) 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, 272555 + ... + 272816.

It is an arithmetic number, because the mean of its divisors is an integer number (17997276).

Almost surely, 2^71443601 is an apocalyptic number.

It is an amenable number.

71443601 is a deficient number, since it is larger than the sum of its proper divisors (545503).

71443601 is a wasteful number, since it uses less digits than its factorization.

71443601 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 545502.

The product of its (nonzero) digits is 2016, while the sum is 26.

The square root of 71443601 is about 8452.4316619539. The cubic root of 71443601 is about 414.9423658290.

The spelling of 71443601 in words is "seventy-one million, four hundred forty-three thousand, six hundred one".