71975689 has 4 divisors (see below), whose sum is σ = 72612756. Its totient is φ = 71338624.

The previous prime is 71975681. The next prime is 71975699. The reversal of 71975689 is 98657917.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 98657917 = 503 ⋅196139.

It can be written as a sum of positive squares in 2 ways, for example, as 1550025 + 70425664 = 1245^2 + 8392^2 .

It is a cyclic number.

It is not a de Polignac number, because 71975689 - 2³ = 71975681 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (71975681) 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, 318364 + ... + 318589.

It is an arithmetic number, because the mean of its divisors is an integer number (18153189).

Almost surely, 2^71975689 is an apocalyptic number.

It is an amenable number.

71975689 is a deficient number, since it is larger than the sum of its proper divisors (637067).

71975689 is a wasteful number, since it uses less digits than its factorization.

71975689 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 637066.

The product of its digits is 952560, while the sum is 52.

The square root of 71975689 is about 8483.8487138798. The cubic root of 71975689 is about 415.9699362674.

The spelling of 71975689 in words is "seventy-one million, nine hundred seventy-five thousand, six hundred eighty-nine".