408545849 has 4 divisors (see below), whose sum is σ = 426308736. Its totient is φ = 390782964.

The previous prime is 408545827. The next prime is 408545899. The reversal of 408545849 is 948545804.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 408545849 - 2⁸ = 408545593 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (408545899) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8881409 + ... + 8881454.

It is an arithmetic number, because the mean of its divisors is an integer number (106577184).

Almost surely, 2^408545849 is an apocalyptic number.

It is an amenable number.

408545849 is a deficient number, since it is larger than the sum of its proper divisors (17762887).

408545849 is a wasteful number, since it uses less digits than its factorization.

408545849 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17762886.

The product of its (nonzero) digits is 921600, while the sum is 47.

The square root of 408545849 is about 20212.5171366656. The cubic root of 408545849 is about 742.0165650673.

The spelling of 408545849 in words is "four hundred eight million, five hundred forty-five thousand, eight hundred forty-nine".