648394067 has 2 divisors, whose sum is σ = 648394068. Its totient is φ = 648394066.

The previous prime is 648394051. The next prime is 648394079. The reversal of 648394067 is 760493846.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 648394067 - 2⁴ = 648394051 is a prime.

It is a super-2 number, since 2×648394067² = 840829732241600978, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (648394867) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 324197033 + 324197034.

It is an arithmetic number, because the mean of its divisors is an integer number (324197034).

Almost surely, 2^648394067 is an apocalyptic number.

648394067 is a deficient number, since it is larger than the sum of its proper divisors (1).

648394067 is an equidigital number, since it uses as much as digits as its factorization.

648394067 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 870912, while the sum is 47.

The square root of 648394067 is about 25463.5831532014. The cubic root of 648394067 is about 865.5251211326.

The spelling of 648394067 in words is "six hundred forty-eight million, three hundred ninety-four thousand, sixty-seven".