71320769 has 8 divisors (see below), whose sum is σ = 80146752. Its totient is φ = 62971920.

The previous prime is 71320759. The next prime is 71320783. The reversal of 71320769 is 96702317.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 71320769 - 2²⁰ = 70272193 is a prime.

It is a super-2 number, since 2×71320769² = 10173304181502722, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (71320709) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 118967 + ... + 119564.

It is an arithmetic number, because the mean of its divisors is an integer number (10018344).

Almost surely, 2^71320769 is an apocalyptic number.

It is an amenable number.

71320769 is a deficient number, since it is larger than the sum of its proper divisors (8825983).

71320769 is a wasteful number, since it uses less digits than its factorization.

71320769 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 238567.

The product of its (nonzero) digits is 15876, while the sum is 35.

The square root of 71320769 is about 8445.1624614332. The cubic root of 71320769 is about 414.7044278493.

The spelling of 71320769 in words is "seventy-one million, three hundred twenty thousand, seven hundred sixty-nine".