71322649 has 2 divisors, whose sum is σ = 71322650. Its totient is φ = 71322648.

The previous prime is 71322623. The next prime is 71322653. The reversal of 71322649 is 94622317.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 71318025 + 4624 = 8445^2 + 68^2 .

It is a cyclic number.

It is not a de Polignac number, because 71322649 - 2⁵ = 71322617 is a prime.

It is not a weakly prime, because it can be changed into another prime (71322689) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35661324 + 35661325.

It is an arithmetic number, because the mean of its divisors is an integer number (35661325).

Almost surely, 2^71322649 is an apocalyptic number.

It is an amenable number.

71322649 is a deficient number, since it is larger than the sum of its proper divisors (1).

71322649 is an equidigital number, since it uses as much as digits as its factorization.

71322649 is an evil number, because the sum of its binary digits is even.

The product of its digits is 18144, while the sum is 34.

The square root of 71322649 is about 8445.2737670250. The cubic root of 71322649 is about 414.7080716568.

The spelling of 71322649 in words is "seventy-one million, three hundred twenty-two thousand, six hundred forty-nine".