406704491 has 2 divisors, whose sum is σ = 406704492. Its totient is φ = 406704490.

The previous prime is 406704479. The next prime is 406704499. The reversal of 406704491 is 194407604.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 406704491 - 2¹⁸ = 406442347 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (406704499) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 203352245 + 203352246.

It is an arithmetic number, because the mean of its divisors is an integer number (203352246).

Almost surely, 2^406704491 is an apocalyptic number.

406704491 is a deficient number, since it is larger than the sum of its proper divisors (1).

406704491 is an equidigital number, since it uses as much as digits as its factorization.

406704491 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 24192, while the sum is 35.

The square root of 406704491 is about 20166.9157532827. The cubic root of 406704491 is about 740.9001044882.

The spelling of 406704491 in words is "four hundred six million, seven hundred four thousand, four hundred ninety-one".