71909697 has 8 divisors (see below), whose sum is σ = 96728544. Its totient is φ = 47515328.

The previous prime is 71909687. The next prime is 71909749. The reversal of 71909697 is 79690917.

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 71909697 - 2⁶ = 71909633 is a prime.

It is not an unprimeable number, because it can be changed into a prime (71909627) 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, 105723 + ... + 106400.

It is an arithmetic number, because the mean of its divisors is an integer number (12091068).

Almost surely, 2^71909697 is an apocalyptic number.

It is an amenable number.

71909697 is a deficient number, since it is larger than the sum of its proper divisors (24818847).

71909697 is a wasteful number, since it uses less digits than its factorization.

71909697 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 212239.

The product of its (nonzero) digits is 214326, while the sum is 48.

The square root of 71909697 is about 8479.9585494270. The cubic root of 71909697 is about 415.8427679497.

The spelling of 71909697 in words is "seventy-one million, nine hundred nine thousand, six hundred ninety-seven".