71759969 has 4 divisors (see below), whose sum is σ = 71866644. Its totient is φ = 71653296.

The previous prime is 71759959. The next prime is 71759993. The reversal of 71759969 is 96995717.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 55056400 + 16703569 = 7420^2 + 4087^2 .

It is a cyclic number.

It is not a de Polignac number, because 71759969 - 2¹⁶ = 71694433 is a prime.

It is a super-2 number, since 2×71759969² = 10298986301761922, which contains 22 as substring.

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 71759969.

It is not an unprimeable number, because it can be changed into a prime (71759939) 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, 52322 + ... + 53675.

It is an arithmetic number, because the mean of its divisors is an integer number (17966661).

Almost surely, 2^71759969 is an apocalyptic number.

It is an amenable number.

71759969 is a deficient number, since it is larger than the sum of its proper divisors (106675).

71759969 is a wasteful number, since it uses less digits than its factorization.

71759969 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 106674.

The product of its digits is 1071630, while the sum is 53.

The square root of 71759969 is about 8471.1256040741. The cubic root of 71759969 is about 415.5539493675.

The spelling of 71759969 in words is "seventy-one million, seven hundred fifty-nine thousand, nine hundred sixty-nine".