71808897 has 8 divisors (see below), whose sum is σ = 98333056. Its totient is φ = 46578672.

The previous prime is 71808883. The next prime is 71808907. The reversal of 71808897 is 79880817.

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

It is not a de Polignac number, because 71808897 - 2⁴ = 71808881 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (71808827) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 323353 + ... + 323574.

It is an arithmetic number, because the mean of its divisors is an integer number (12291632).

Almost surely, 2^71808897 is an apocalyptic number.

It is an amenable number.

71808897 is a deficient number, since it is larger than the sum of its proper divisors (26524159).

71808897 is a wasteful number, since it uses less digits than its factorization.

71808897 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 646967.

The product of its (nonzero) digits is 225792, while the sum is 48.

The square root of 71808897 is about 8474.0130398767. The cubic root of 71808897 is about 415.6483734344.

The spelling of 71808897 in words is "seventy-one million, eight hundred eight thousand, eight hundred ninety-seven".