71089869 has 8 divisors (see below), whose sum is σ = 100362240. Its totient is φ = 44605376.

The previous prime is 71089831. The next prime is 71089871. The reversal of 71089869 is 96898017.

It is a happy number.

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 71089869 - 2⁹ = 71089357 is a prime.

It is a super-2 number, since 2×71089869² = 10107538948874322, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71089819) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 696909 + ... + 697010.

It is an arithmetic number, because the mean of its divisors is an integer number (12545280).

Almost surely, 2^71089869 is an apocalyptic number.

It is an amenable number.

71089869 is a deficient number, since it is larger than the sum of its proper divisors (29272371).

71089869 is a wasteful number, since it uses less digits than its factorization.

71089869 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1393939.

The product of its (nonzero) digits is 217728, while the sum is 48.

The square root of 71089869 is about 8431.4808307912. The cubic root of 71089869 is about 414.2564107409.

The spelling of 71089869 in words is "seventy-one million, eighty-nine thousand, eight hundred sixty-nine".