405994208273 has 2 divisors, whose sum is σ = 405994208274. Its totient is φ = 405994208272.

The previous prime is 405994208189. The next prime is 405994208303. The reversal of 405994208273 is 372802499504.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 332245029649 + 73749178624 = 576407^2 + 271568^2 .

It is a cyclic number.

It is not a de Polignac number, because 405994208273 - 2²² = 405990013969 is a prime.

It is not a weakly prime, because it can be changed into another prime (405994207273) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 202997104136 + 202997104137.

It is an arithmetic number, because the mean of its divisors is an integer number (202997104137).

Almost surely, 2^405994208273 is an apocalyptic number.

It is an amenable number.

405994208273 is a deficient number, since it is larger than the sum of its proper divisors (1).

405994208273 is an equidigital number, since it uses as much as digits as its factorization.

405994208273 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4354560, while the sum is 53.

The spelling of 405994208273 in words is "four hundred five billion, nine hundred ninety-four million, two hundred eight thousand, two hundred seventy-three".