409948189 has 4 divisors (see below), whose sum is σ = 468512224. Its totient is φ = 351384156.

The previous prime is 409948181. The next prime is 409948207. The reversal of 409948189 is 981849904.

It is a happy number.

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 409948189 - 2³ = 409948181 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 (409948181) 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, 29282007 + ... + 29282020.

It is an arithmetic number, because the mean of its divisors is an integer number (117128056).

Almost surely, 2^409948189 is an apocalyptic number.

It is an amenable number.

409948189 is a deficient number, since it is larger than the sum of its proper divisors (58564035).

409948189 is an equidigital number, since it uses as much as digits as its factorization.

409948189 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 58564034.

The product of its (nonzero) digits is 746496, while the sum is 52.

The square root of 409948189 is about 20247.1773094424. The cubic root of 409948189 is about 742.8645899983.

The spelling of 409948189 in words is "four hundred nine million, nine hundred forty-eight thousand, one hundred eighty-nine".