71761289 has 4 divisors (see below), whose sum is σ = 71877840. Its totient is φ = 71644740.

The previous prime is 71761253. The next prime is 71761297. The reversal of 71761289 is 98216717.

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: 98216717 = 3541 ⋅27737.

It is a cyclic number.

It is not a de Polignac number, because 71761289 - 2⁸ = 71761033 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (71761189) 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, 57347 + ... + 58584.

It is an arithmetic number, because the mean of its divisors is an integer number (17969460).

Almost surely, 2^71761289 is an apocalyptic number.

It is an amenable number.

71761289 is a deficient number, since it is larger than the sum of its proper divisors (116551).

71761289 is a wasteful number, since it uses less digits than its factorization.

71761289 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 116550.

The product of its digits is 42336, while the sum is 41.

The square root of 71761289 is about 8471.2035154398. The cubic root of 71761289 is about 415.5564973426.

The spelling of 71761289 in words is "seventy-one million, seven hundred sixty-one thousand, two hundred eighty-nine".