648212827 has 2 divisors, whose sum is σ = 648212828. Its totient is φ = 648212826.

The previous prime is 648212791. The next prime is 648212833. The reversal of 648212827 is 728212846.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 648212827 - 2¹⁵ = 648180059 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 648212827.

It is not a weakly prime, because it can be changed into another prime (648212837) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 324106413 + 324106414.

It is an arithmetic number, because the mean of its divisors is an integer number (324106414).

Almost surely, 2^648212827 is an apocalyptic number.

648212827 is a deficient number, since it is larger than the sum of its proper divisors (1).

648212827 is an equidigital number, since it uses as much as digits as its factorization.

648212827 is an evil number, because the sum of its binary digits is even.

The product of its digits is 86016, while the sum is 40.

The square root of 648212827 is about 25460.0240966107. The cubic root of 648212827 is about 865.4444693607. Note that the first 4 decimals are identical.

The spelling of 648212827 in words is "six hundred forty-eight million, two hundred twelve thousand, eight hundred twenty-seven".