71670211 has 2 divisors, whose sum is σ = 71670212. Its totient is φ = 71670210.

The previous prime is 71670197. The next prime is 71670217. The reversal of 71670211 is 11207617.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 71670211 - 2⁷ = 71670083 is a prime.

It is not a weakly prime, because it can be changed into another prime (71670217) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35835105 + 35835106.

It is an arithmetic number, because the mean of its divisors is an integer number (35835106).

Almost surely, 2^71670211 is an apocalyptic number.

71670211 is a deficient number, since it is larger than the sum of its proper divisors (1).

71670211 is an equidigital number, since it uses as much as digits as its factorization.

71670211 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 588, while the sum is 25.

The square root of 71670211 is about 8465.8260671951. The cubic root of 71670211 is about 415.3806175682.

Adding to 71670211 its reverse (11207617), we get a palindrome (82877828).

The spelling of 71670211 in words is "seventy-one million, six hundred seventy thousand, two hundred eleven".