408993149 has 2 divisors, whose sum is σ = 408993150. Its totient is φ = 408993148.

The previous prime is 408993139. The next prime is 408993161. The reversal of 408993149 is 941399804.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 408767524 + 225625 = 20218^2 + 475^2 .

It is a cyclic number.

It is not a de Polignac number, because 408993149 - 2⁸ = 408992893 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (408993139) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 204496574 + 204496575.

It is an arithmetic number, because the mean of its divisors is an integer number (204496575).

Almost surely, 2^408993149 is an apocalyptic number.

It is an amenable number.

408993149 is a deficient number, since it is larger than the sum of its proper divisors (1).

408993149 is an equidigital number, since it uses as much as digits as its factorization.

408993149 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 279936, while the sum is 47.

The square root of 408993149 is about 20223.5790353735. The cubic root of 408993149 is about 742.2872674089.

The spelling of 408993149 in words is "four hundred eight million, nine hundred ninety-three thousand, one hundred forty-nine".