71031489 has 4 divisors (see below), whose sum is σ = 94708656. Its totient is φ = 47354324.

The previous prime is 71031487. The next prime is 71031503. The reversal of 71031489 is 98413017.

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.

It is a cyclic number.

It is not a de Polignac number, because 71031489 - 2¹ = 71031487 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (71031487) 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, 11838579 + ... + 11838584.

It is an arithmetic number, because the mean of its divisors is an integer number (23677164).

Almost surely, 2^71031489 is an apocalyptic number.

It is an amenable number.

71031489 is a deficient number, since it is larger than the sum of its proper divisors (23677167).

71031489 is a wasteful number, since it uses less digits than its factorization.

71031489 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23677166.

The product of its (nonzero) digits is 6048, while the sum is 33.

The square root of 71031489 is about 8428.0180944277. The cubic root of 71031489 is about 414.1429819557.

The spelling of 71031489 in words is "seventy-one million, thirty-one thousand, four hundred eighty-nine".