71262649 has 2 divisors, whose sum is σ = 71262650. Its totient is φ = 71262648.

The previous prime is 71262647. The next prime is 71262727. The reversal of 71262649 is 94626217.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 71098624 + 164025 = 8432^2 + 405^2 .

It is a cyclic number.

It is not a de Polignac number, because 71262649 - 2¹ = 71262647 is a prime.

Together with 71262647, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (71262641) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35631324 + 35631325.

It is an arithmetic number, because the mean of its divisors is an integer number (35631325).

Almost surely, 2^71262649 is an apocalyptic number.

It is an amenable number.

71262649 is a deficient number, since it is larger than the sum of its proper divisors (1).

71262649 is an equidigital number, since it uses as much as digits as its factorization.

71262649 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 36288, while the sum is 37.

The square root of 71262649 is about 8441.7207369114. The cubic root of 71262649 is about 414.5917483226.

The spelling of 71262649 in words is "seventy-one million, two hundred sixty-two thousand, six hundred forty-nine".