71715397 has 8 divisors (see below), whose sum is σ = 77337344. Its totient is φ = 66108528.

The previous prime is 71715389. The next prime is 71715407. The reversal of 71715397 is 79351717.

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 71715397 - 2³ = 71715389 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71715317) 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, 7348 + ... + 14050.

It is an arithmetic number, because the mean of its divisors is an integer number (9667168).

Almost surely, 2^71715397 is an apocalyptic number.

It is an amenable number.

71715397 is a deficient number, since it is larger than the sum of its proper divisors (5621947).

71715397 is a wasteful number, since it uses less digits than its factorization.

71715397 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7539.

The product of its digits is 46305, while the sum is 40.

The square root of 71715397 is about 8468.4943762159. The cubic root of 71715397 is about 415.4678943935.

The spelling of 71715397 in words is "seventy-one million, seven hundred fifteen thousand, three hundred ninety-seven".