71709407 has 16 divisors (see below), whose sum is σ = 90120192. Its totient is φ = 55429920.

The previous prime is 71709397. The next prime is 71709409. The reversal of 71709407 is 70490717.

It is not a de Polignac number, because 71709407 - 2¹⁰ = 71708383 is a prime.

It is a Smith number, since the sum of its digits (35) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71709409) 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, 6113 + ... + 13445.

It is an arithmetic number, because the mean of its divisors is an integer number (5632512).

Almost surely, 2^71709407 is an apocalyptic number.

71709407 is a gapful number since it is divisible by the number (77) formed by its first and last digit.

71709407 is a deficient number, since it is larger than the sum of its proper divisors (18410785).

71709407 is a wasteful number, since it uses less digits than its factorization.

71709407 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7478.

The product of its (nonzero) digits is 12348, while the sum is 35.

The square root of 71709407 is about 8468.1407050190. The cubic root of 71709407 is about 415.4563268079.

The spelling of 71709407 in words is "seventy-one million, seven hundred nine thousand, four hundred seven".