408012091 has 2 divisors, whose sum is σ = 408012092. Its totient is φ = 408012090.

The previous prime is 408012083. The next prime is 408012097. The reversal of 408012091 is 190210804.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 408012091 - 2³ = 408012083 is a prime.

It is not a weakly prime, because it can be changed into another prime (408012097) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 204006045 + 204006046.

It is an arithmetic number, because the mean of its divisors is an integer number (204006046).

Almost surely, 2^408012091 is an apocalyptic number.

408012091 is a deficient number, since it is larger than the sum of its proper divisors (1).

408012091 is an equidigital number, since it uses as much as digits as its factorization.

408012091 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 576, while the sum is 25.

The square root of 408012091 is about 20199.3091713553. The cubic root of 408012091 is about 741.6932803535.

Adding to 408012091 its reverse (190210804), we get a palindrome (598222895).

The spelling of 408012091 in words is "four hundred eight million, twelve thousand, ninety-one".