648241189 has 2 divisors, whose sum is σ = 648241190. Its totient is φ = 648241188.

The previous prime is 648241171. The next prime is 648241199. The reversal of 648241189 is 981142846.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 431268289 + 216972900 = 20767^2 + 14730^2 .

It is a cyclic number.

It is not a de Polignac number, because 648241189 - 2⁵ = 648241157 is a prime.

It is a super-2 number, since 2×648241189² = 840433278232267442, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (648241169) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 324120594 + 324120595.

It is an arithmetic number, because the mean of its divisors is an integer number (324120595).

Almost surely, 2^648241189 is an apocalyptic number.

It is an amenable number.

648241189 is a deficient number, since it is larger than the sum of its proper divisors (1).

648241189 is an equidigital number, since it uses as much as digits as its factorization.

648241189 is an evil number, because the sum of its binary digits is even.

The product of its digits is 110592, while the sum is 43.

The square root of 648241189 is about 25460.5810813500. The cubic root of 648241189 is about 865.4570914384.

The spelling of 648241189 in words is "six hundred forty-eight million, two hundred forty-one thousand, one hundred eighty-nine".