71908087 has 4 divisors (see below), whose sum is σ = 72031176. Its totient is φ = 71785000.

The previous prime is 71908069. The next prime is 71908093. The reversal of 71908087 is 78080917.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 71908087 - 2²³ = 63519479 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 (71908037) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 60664 + ... + 61837.

It is an arithmetic number, because the mean of its divisors is an integer number (18007794).

Almost surely, 2^71908087 is an apocalyptic number.

71908087 is a deficient number, since it is larger than the sum of its proper divisors (123089).

71908087 is a wasteful number, since it uses less digits than its factorization.

71908087 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 123088.

The product of its (nonzero) digits is 28224, while the sum is 40.

The square root of 71908087 is about 8479.8636191863. The cubic root of 71908087 is about 415.8396644654.

The spelling of 71908087 in words is "seventy-one million, nine hundred eight thousand, eighty-seven".