409145893 has 8 divisors (see below), whose sum is σ = 440844768. Its totient is φ = 377479344.

The previous prime is 409145887. The next prime is 409145899. The reversal of 409145893 is 398541904.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (409145887) and next prime (409145899).

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-409145893 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (409145899) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 22530 + ... + 36412.

It is an arithmetic number, because the mean of its divisors is an integer number (55105596).

Almost surely, 2^409145893 is an apocalyptic number.

It is an amenable number.

409145893 is a deficient number, since it is larger than the sum of its proper divisors (31698875).

409145893 is a wasteful number, since it uses less digits than its factorization.

409145893 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16163.

The product of its (nonzero) digits is 155520, while the sum is 43.

The square root of 409145893 is about 20227.3550668396. The cubic root of 409145893 is about 742.3796616337.

The spelling of 409145893 in words is "four hundred nine million, one hundred forty-five thousand, eight hundred ninety-three".