408213247 has 6 divisors (see below), whose sum is σ = 442029912. Its totient is φ = 376812072.

The previous prime is 408213241. The next prime is 408213287. The reversal of 408213247 is 742312804.

It is a de Polignac number, because none of the positive numbers 2^k-408213247 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (408213241) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1207563 + ... + 1207900.

It is an arithmetic number, because the mean of its divisors is an integer number (73671652).

Almost surely, 2^408213247 is an apocalyptic number.

408213247 is a deficient number, since it is larger than the sum of its proper divisors (33816665).

408213247 is a wasteful number, since it uses less digits than its factorization.

408213247 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2415489 (or 2415476 counting only the distinct ones).

The product of its (nonzero) digits is 10752, while the sum is 31.

The square root of 408213247 is about 20204.2878369914. The cubic root of 408213247 is about 741.8151489164.

The spelling of 408213247 in words is "four hundred eight million, two hundred thirteen thousand, two hundred forty-seven".