71211667 has 2 divisors, whose sum is σ = 71211668. Its totient is φ = 71211666.

The previous prime is 71211661. The next prime is 71211689. The reversal of 71211667 is 76611217.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-71211667 is a prime.

It is a super-2 number, since 2×71211667² = 10142203033837778, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (71211661) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35605833 + 35605834.

It is an arithmetic number, because the mean of its divisors is an integer number (35605834).

Almost surely, 2^71211667 is an apocalyptic number.

71211667 is a deficient number, since it is larger than the sum of its proper divisors (1).

71211667 is an equidigital number, since it uses as much as digits as its factorization.

71211667 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3528, while the sum is 31.

The square root of 71211667 is about 8438.7005516252. The cubic root of 71211667 is about 414.4928570648.

The spelling of 71211667 in words is "seventy-one million, two hundred eleven thousand, six hundred sixty-seven".