71680399 has 8 divisors (see below), whose sum is σ = 82202400. Its totient is φ = 61228896.

The previous prime is 71680363. The next prime is 71680403. The reversal of 71680399 is 99308617.

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 71680399 - 2¹³ = 71672207 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71680309) 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, 15424 + ... + 19525.

It is an arithmetic number, because the mean of its divisors is an integer number (10275300).

Almost surely, 2^71680399 is an apocalyptic number.

71680399 is a deficient number, since it is larger than the sum of its proper divisors (10522001).

71680399 is a wasteful number, since it uses less digits than its factorization.

71680399 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35249.

The product of its (nonzero) digits is 81648, while the sum is 43.

The square root of 71680399 is about 8466.4277590965. The cubic root of 71680399 is about 415.4002989075.

The spelling of 71680399 in words is "seventy-one million, six hundred eighty thousand, three hundred ninety-nine".