408345673 has 4 divisors (see below), whose sum is σ = 417842128. Its totient is φ = 398849220.

The previous prime is 408345649. The next prime is 408345677. The reversal of 408345673 is 376543804.

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 408345673 - 2¹³ = 408337481 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (408345677) 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, 4748163 + ... + 4748248.

It is an arithmetic number, because the mean of its divisors is an integer number (104460532).

Almost surely, 2^408345673 is an apocalyptic number.

408345673 is a gapful number since it is divisible by the number (43) formed by its first and last digit.

It is an amenable number.

408345673 is a deficient number, since it is larger than the sum of its proper divisors (9496455).

408345673 is an equidigital number, since it uses as much as digits as its factorization.

408345673 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9496454.

The product of its (nonzero) digits is 241920, while the sum is 40.

The square root of 408345673 is about 20207.5647468961. The cubic root of 408345673 is about 741.8953561716.

The spelling of 408345673 in words is "four hundred eight million, three hundred forty-five thousand, six hundred seventy-three".