71071087 has 2 divisors, whose sum is σ = 71071088. Its totient is φ = 71071086.

The previous prime is 71071069. The next prime is 71071093. The reversal of 71071087 is 78017017.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-71071087 is a prime.

It is equal to p_4177291 and since 71071087 and 4177291 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (71071057) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35535543 + 35535544.

It is an arithmetic number, because the mean of its divisors is an integer number (35535544).

Almost surely, 2^71071087 is an apocalyptic number.

71071087 is a deficient number, since it is larger than the sum of its proper divisors (1).

71071087 is an equidigital number, since it uses as much as digits as its factorization.

71071087 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2744, while the sum is 31.

The square root of 71071087 is about 8430.3669552398. The cubic root of 71071087 is about 414.2199252363.

The spelling of 71071087 in words is "seventy-one million, seventy-one thousand, eighty-seven".