71519897 has 2 divisors, whose sum is σ = 71519898. Its totient is φ = 71519896.

The previous prime is 71519849. The next prime is 71519911. The reversal of 71519897 is 79891517.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 61716736 + 9803161 = 7856^2 + 3131^2 .

It is a cyclic number.

It is not a de Polignac number, because 71519897 - 2¹⁰ = 71518873 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (71519297) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35759948 + 35759949.

It is an arithmetic number, because the mean of its divisors is an integer number (35759949).

Almost surely, 2^71519897 is an apocalyptic number.

It is an amenable number.

71519897 is a deficient number, since it is larger than the sum of its proper divisors (1).

71519897 is an equidigital number, since it uses as much as digits as its factorization.

71519897 is an evil number, because the sum of its binary digits is even.

The product of its digits is 158760, while the sum is 47.

The square root of 71519897 is about 8456.9437150782. The cubic root of 71519897 is about 415.0900215995.

The spelling of 71519897 in words is "seventy-one million, five hundred nineteen thousand, eight hundred ninety-seven".