71709361 has 4 divisors (see below), whose sum is σ = 72719424. Its totient is φ = 70699300.

The previous prime is 71709359. The next prime is 71709389. The reversal of 71709361 is 16390717.

It is a happy number.

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, and also an emirpimes, since its reverse is a distinct semiprime: 16390717 = 7 ⋅2341531.

It is a cyclic number.

It is not a de Polignac number, because 71709361 - 2¹ = 71709359 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (71709061) 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, 504925 + ... + 505066.

It is an arithmetic number, because the mean of its divisors is an integer number (18179856).

Almost surely, 2^71709361 is an apocalyptic number.

71709361 is a gapful number since it is divisible by the number (71) formed by its first and last digit.

It is an amenable number.

71709361 is a deficient number, since it is larger than the sum of its proper divisors (1010063).

71709361 is a wasteful number, since it uses less digits than its factorization.

71709361 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1010062.

The product of its (nonzero) digits is 7938, while the sum is 34.

The square root of 71709361 is about 8468.1379889560. The cubic root of 71709361 is about 415.4562379725.

The spelling of 71709361 in words is "seventy-one million, seven hundred nine thousand, three hundred sixty-one".