71274649 has 2 divisors, whose sum is σ = 71274650. Its totient is φ = 71274648.

The previous prime is 71274641. The next prime is 71274689. The reversal of 71274649 is 94647217.

It is an a-pointer prime, because the next prime (71274689) can be obtained adding 71274649 to its sum of digits (40).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 55234624 + 16040025 = 7432^2 + 4005^2 .

It is a cyclic number.

It is not a de Polignac number, because 71274649 - 2³ = 71274641 is a prime.

It is not a weakly prime, because it can be changed into another prime (71274641) 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, 35637324 + 35637325.

It is an arithmetic number, because the mean of its divisors is an integer number (35637325).

Almost surely, 2^71274649 is an apocalyptic number.

It is an amenable number.

71274649 is a deficient number, since it is larger than the sum of its proper divisors (1).

71274649 is an equidigital number, since it uses as much as digits as its factorization.

71274649 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 84672, while the sum is 40.

The square root of 71274649 is about 8442.4314625586. The cubic root of 71274649 is about 414.6150182114.

The spelling of 71274649 in words is "seventy-one million, two hundred seventy-four thousand, six hundred forty-nine".