216797473 has 2 divisors, whose sum is σ = 216797474. Its totient is φ = 216797472.

The previous prime is 216797423. The next prime is 216797501. The reversal of 216797473 is 374797612.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 216001809 + 795664 = 14697^2 + 892^2 .

It is a cyclic number.

It is not a de Polignac number, because 216797473 - 2¹³ = 216789281 is a prime.

It is a super-2 number, since 2×216797473² = 94002288598371458, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (216797423) 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, 108398736 + 108398737.

It is an arithmetic number, because the mean of its divisors is an integer number (108398737).

Almost surely, 2^216797473 is an apocalyptic number.

It is an amenable number.

216797473 is a deficient number, since it is larger than the sum of its proper divisors (1).

216797473 is an equidigital number, since it uses as much as digits as its factorization.

216797473 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 444528, while the sum is 46.

The square root of 216797473 is about 14724.0440436722. The cubic root of 216797473 is about 600.7374940587.

The spelling of 216797473 in words is "two hundred sixteen million, seven hundred ninety-seven thousand, four hundred seventy-three".