71185087 has 2 divisors, whose sum is σ = 71185088. Its totient is φ = 71185086.

The previous prime is 71185057. The next prime is 71185091. The reversal of 71185087 is 78058117.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 71185087 - 2²³ = 62796479 is a prime.

It is a super-2 number, since 2×71185087² = 10134633222395138, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (71185027) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35592543 + 35592544.

It is an arithmetic number, because the mean of its divisors is an integer number (35592544).

Almost surely, 2^71185087 is an apocalyptic number.

71185087 is a deficient number, since it is larger than the sum of its proper divisors (1).

71185087 is an equidigital number, since it uses as much as digits as its factorization.

71185087 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 15680, while the sum is 37.

The square root of 71185087 is about 8437.1255176156. The cubic root of 71185087 is about 414.4412803517.

The spelling of 71185087 in words is "seventy-one million, one hundred eighty-five thousand, eighty-seven".