71470509 has 8 divisors (see below), whose sum is σ = 103957152. Its totient is φ = 43315440.

The previous prime is 71470507. The next prime is 71470657. The reversal of 71470509 is 90507417.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 71470509 - 2¹ = 71470507 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (33), and also a Moran number because the ratio is a prime number: 2165773 = 71470509 / (7 + 1 + 4 + 7 + 0 + 5 + 0 + 9).

It is a self number, because there is not a number n which added to its sum of digits gives 71470509.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71470501) 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, 1082854 + ... + 1082919.

It is an arithmetic number, because the mean of its divisors is an integer number (12994644).

Almost surely, 2^71470509 is an apocalyptic number.

It is an amenable number.

71470509 is a deficient number, since it is larger than the sum of its proper divisors (32486643).

71470509 is a wasteful number, since it uses less digits than its factorization.

71470509 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2165787.

The product of its (nonzero) digits is 8820, while the sum is 33.

The square root of 71470509 is about 8454.0232434031. The cubic root of 71470509 is about 414.9944529185.

The spelling of 71470509 in words is "seventy-one million, four hundred seventy thousand, five hundred nine".