406776744397 has 2 divisors, whose sum is σ = 406776744398. Its totient is φ = 406776744396.

The previous prime is 406776744383. The next prime is 406776744401. The reversal of 406776744397 is 793447677604.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 295184669481 + 111592074916 = 543309^2 + 334054^2 .

It is a cyclic number.

It is not a de Polignac number, because 406776744397 - 2¹¹ = 406776742349 is a prime.

It is a super-4 number, since 4×406776744397⁴ (a number of 48 digits) contains 4444 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (406776744307) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 203388372198 + 203388372199.

It is an arithmetic number, because the mean of its divisors is an integer number (203388372199).

Almost surely, 2^406776744397 is an apocalyptic number.

It is an amenable number.

406776744397 is a deficient number, since it is larger than the sum of its proper divisors (1).

406776744397 is an equidigital number, since it uses as much as digits as its factorization.

406776744397 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 149361408, while the sum is 64.

The spelling of 406776744397 in words is "four hundred six billion, seven hundred seventy-six million, seven hundred forty-four thousand, three hundred ninety-seven".