71570497 has 2 divisors, whose sum is σ = 71570498. Its totient is φ = 71570496.

The previous prime is 71570489. The next prime is 71570509. The reversal of 71570497 is 79407517.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 71301136 + 269361 = 8444^2 + 519^2 .

It is a cyclic number.

It is not a de Polignac number, because 71570497 - 2³ = 71570489 is a prime.

It is not a weakly prime, because it can be changed into another prime (71570407) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35785248 + 35785249.

It is an arithmetic number, because the mean of its divisors is an integer number (35785249).

Almost surely, 2^71570497 is an apocalyptic number.

It is an amenable number.

71570497 is a deficient number, since it is larger than the sum of its proper divisors (1).

71570497 is an equidigital number, since it uses as much as digits as its factorization.

71570497 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 61740, while the sum is 40.

The square root of 71570497 is about 8459.9348106235. The cubic root of 71570497 is about 415.1878899532.

The spelling of 71570497 in words is "seventy-one million, five hundred seventy thousand, four hundred ninety-seven".