406019249 has 2 divisors, whose sum is σ = 406019250. Its totient is φ = 406019248.

The previous prime is 406019239. The next prime is 406019291. The reversal of 406019249 is 942910604.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 222606400 + 183412849 = 14920^2 + 13543^2 .

It is a cyclic number.

It is not a de Polignac number, because 406019249 - 2⁸ = 406018993 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (406019239) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 203009624 + 203009625.

It is an arithmetic number, because the mean of its divisors is an integer number (203009625).

Almost surely, 2^406019249 is an apocalyptic number.

It is an amenable number.

406019249 is a deficient number, since it is larger than the sum of its proper divisors (1).

406019249 is an equidigital number, since it uses as much as digits as its factorization.

406019249 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 15552, while the sum is 35.

The square root of 406019249 is about 20149.9193298633. The cubic root of 406019249 is about 740.4837651224.

The spelling of 406019249 in words is "four hundred six million, nineteen thousand, two hundred forty-nine".