406209926249 has 2 divisors, whose sum is σ = 406209926250. Its totient is φ = 406209926248.

The previous prime is 406209926209. The next prime is 406209926267. The reversal of 406209926249 is 942629902604.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 394308643600 + 11901282649 = 627940^2 + 109093^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-406209926249 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 406209926249.

It is not a weakly prime, because it can be changed into another prime (406209926209) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 203104963124 + 203104963125.

It is an arithmetic number, because the mean of its divisors is an integer number (203104963125).

Almost surely, 2^406209926249 is an apocalyptic number.

It is an amenable number.

406209926249 is a deficient number, since it is larger than the sum of its proper divisors (1).

406209926249 is an equidigital number, since it uses as much as digits as its factorization.

406209926249 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3359232, while the sum is 53.

The spelling of 406209926249 in words is "four hundred six billion, two hundred nine million, nine hundred twenty-six thousand, two hundred forty-nine".