127213649 has 2 divisors, whose sum is σ = 127213650. Its totient is φ = 127213648.

The previous prime is 127213643. The next prime is 127213699. The reversal of 127213649 is 946312721.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 98644624 + 28569025 = 9932^2 + 5345^2 .

It is a cyclic number.

It is not a de Polignac number, because 127213649 - 2²⁴ = 110436433 is a prime.

It is not a weakly prime, because it can be changed into another prime (127213643) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 63606824 + 63606825.

It is an arithmetic number, because the mean of its divisors is an integer number (63606825).

Almost surely, 2^127213649 is an apocalyptic number.

It is an amenable number.

127213649 is a deficient number, since it is larger than the sum of its proper divisors (1).

127213649 is an equidigital number, since it uses as much as digits as its factorization.

127213649 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 18144, while the sum is 35.

The square root of 127213649 is about 11278.9028278463. The cubic root of 127213649 is about 502.9342783358.

The spelling of 127213649 in words is "one hundred twenty-seven million, two hundred thirteen thousand, six hundred forty-nine".