71655313 has 2 divisors, whose sum is σ = 71655314. Its totient is φ = 71655312.

The previous prime is 71655293. The next prime is 71655319. The reversal of 71655313 is 31355617.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 67782289 + 3873024 = 8233^2 + 1968^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-71655313 is a prime.

It is a super-2 number, since 2×71655313² = 10268967762255938, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (71655319) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35827656 + 35827657.

It is an arithmetic number, because the mean of its divisors is an integer number (35827657).

Almost surely, 2^71655313 is an apocalyptic number.

It is an amenable number.

71655313 is a deficient number, since it is larger than the sum of its proper divisors (1).

71655313 is an equidigital number, since it uses as much as digits as its factorization.

71655313 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 9450, while the sum is 31.

The square root of 71655313 is about 8464.9461309568. The cubic root of 71655313 is about 415.3518340183.

The spelling of 71655313 in words is "seventy-one million, six hundred fifty-five thousand, three hundred thirteen".