406718491 has 2 divisors, whose sum is σ = 406718492. Its totient is φ = 406718490.

The previous prime is 406718479. The next prime is 406718497. The reversal of 406718491 is 194817604.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 406718491 - 2⁷ = 406718363 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (406718497) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 203359245 + 203359246.

It is an arithmetic number, because the mean of its divisors is an integer number (203359246).

Almost surely, 2^406718491 is an apocalyptic number.

406718491 is a deficient number, since it is larger than the sum of its proper divisors (1).

406718491 is an equidigital number, since it uses as much as digits as its factorization.

406718491 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 48384, while the sum is 40.

The square root of 406718491 is about 20167.2628534464. The cubic root of 406718491 is about 740.9086057323.

The spelling of 406718491 in words is "four hundred six million, seven hundred eighteen thousand, four hundred ninety-one".