71396641 has 4 divisors (see below), whose sum is σ = 73057072. Its totient is φ = 69736212.

The previous prime is 71396629. The next prime is 71396681. The reversal of 71396641 is 14669317.

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 71396641 - 2⁷ = 71396513 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 71396641.

It is not an unprimeable number, because it can be changed into a prime (71396681) 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, 830151 + ... + 830236.

It is an arithmetic number, because the mean of its divisors is an integer number (18264268).

Almost surely, 2^71396641 is an apocalyptic number.

It is an amenable number.

71396641 is a deficient number, since it is larger than the sum of its proper divisors (1660431).

71396641 is a wasteful number, since it uses less digits than its factorization.

71396641 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1660430.

The product of its digits is 27216, while the sum is 37.

The square root of 71396641 is about 8449.6533064973. The cubic root of 71396641 is about 414.8514317956.

The spelling of 71396641 in words is "seventy-one million, three hundred ninety-six thousand, six hundred forty-one".