71057197 has 2 divisors, whose sum is σ = 71057198. Its totient is φ = 71057196.

The previous prime is 71057191. The next prime is 71057201. The reversal of 71057197 is 79175017.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 68657796 + 2399401 = 8286^2 + 1549^2 .

It is a cyclic number.

It is not a de Polignac number, because 71057197 - 2⁷ = 71057069 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (71057191) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35528598 + 35528599.

It is an arithmetic number, because the mean of its divisors is an integer number (35528599).

Almost surely, 2^71057197 is an apocalyptic number.

It is an amenable number.

71057197 is a deficient number, since it is larger than the sum of its proper divisors (1).

71057197 is an equidigital number, since it uses as much as digits as its factorization.

71057197 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 15435, while the sum is 37.

The square root of 71057197 is about 8429.5431074288. The cubic root of 71057197 is about 414.1929386896.

The spelling of 71057197 in words is "seventy-one million, fifty-seven thousand, one hundred ninety-seven".