408124749 has 4 divisors (see below), whose sum is σ = 544166336. Its totient is φ = 272083164.

The previous prime is 408124747. The next prime is 408124753. The reversal of 408124749 is 947421804.

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 not a de Polignac number, because 408124749 - 2¹ = 408124747 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 (408124741) 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, 68020789 + ... + 68020794.

It is an arithmetic number, because the mean of its divisors is an integer number (136041584).

Almost surely, 2^408124749 is an apocalyptic number.

It is an amenable number.

408124749 is a deficient number, since it is larger than the sum of its proper divisors (136041587).

408124749 is a wasteful number, since it uses less digits than its factorization.

408124749 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 136041586.

The product of its (nonzero) digits is 64512, while the sum is 39.

The square root of 408124749 is about 20202.0976386117. The cubic root of 408124749 is about 741.7615381283.

The spelling of 408124749 in words is "four hundred eight million, one hundred twenty-four thousand, seven hundred forty-nine".