71593989 has 16 divisors (see below), whose sum is σ = 97658880. Its totient is φ = 46640880.

The previous prime is 71593981. The next prime is 71594027. The reversal of 71593989 is 98939517.

It is a happy number.

It is not a de Polignac number, because 71593989 - 2³ = 71593981 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71593981) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 24972 + ... + 27690.

It is an arithmetic number, because the mean of its divisors is an integer number (6103680).

Almost surely, 2^71593989 is an apocalyptic number.

It is an amenable number.

71593989 is a deficient number, since it is larger than the sum of its proper divisors (26064891).

71593989 is a wasteful number, since it uses less digits than its factorization.

71593989 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2920.

The product of its digits is 612360, while the sum is 51.

The square root of 71593989 is about 8461.3231234837. The cubic root of 71593989 is about 415.2333114950.

The spelling of 71593989 in words is "seventy-one million, five hundred ninety-three thousand, nine hundred eighty-nine".