71510989 has 8 divisors (see below), whose sum is σ = 78742368. Its totient is φ = 64401360.

The previous prime is 71510983. The next prime is 71511031. The reversal of 71510989 is 98901517.

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 71510989 - 2⁷ = 71510861 is a prime.

It is a super-2 number, since 2×71510989² = 10227643095516242, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71510983) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 29202 + ... + 31555.

It is an arithmetic number, because the mean of its divisors is an integer number (9842796).

Almost surely, 2^71510989 is an apocalyptic number.

It is an amenable number.

71510989 is a deficient number, since it is larger than the sum of its proper divisors (7231379).

71510989 is a wasteful number, since it uses less digits than its factorization.

71510989 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 60875.

The product of its (nonzero) digits is 22680, while the sum is 40.

The square root of 71510989 is about 8456.4170308707. The cubic root of 71510989 is about 415.0727873491.

The spelling of 71510989 in words is "seventy-one million, five hundred ten thousand, nine hundred eighty-nine".