647196469 has 2 divisors, whose sum is σ = 647196470. Its totient is φ = 647196468.

The previous prime is 647196463. The next prime is 647196493. The reversal of 647196469 is 964691746.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 626901444 + 20295025 = 25038^2 + 4505^2 .

It is a cyclic number.

It is not a de Polignac number, because 647196469 - 2⁵ = 647196437 is a prime.

It is a super-2 number, since 2×647196469² = 837726538972135922, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (647196463) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 323598234 + 323598235.

It is an arithmetic number, because the mean of its divisors is an integer number (323598235).

Almost surely, 2^647196469 is an apocalyptic number.

It is an amenable number.

647196469 is a deficient number, since it is larger than the sum of its proper divisors (1).

647196469 is an equidigital number, since it uses as much as digits as its factorization.

647196469 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1959552, while the sum is 52.

The square root of 647196469 is about 25440.0563875161. The cubic root of 647196469 is about 864.9919114483.

The spelling of 647196469 in words is "six hundred forty-seven million, one hundred ninety-six thousand, four hundred sixty-nine".