49143209 has 8 divisors (see below), whose sum is σ = 52433568. Its totient is φ = 45897280.

The previous prime is 49143173. The next prime is 49143223. The reversal of 49143209 is 90234194.

It is a happy number.

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

It is not a de Polignac number, because 49143209 - 2¹⁶ = 49077673 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (49103209) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8807 + ... + 13260.

It is an arithmetic number, because the mean of its divisors is an integer number (6554196).

Almost surely, 2^49143209 is an apocalyptic number.

It is an amenable number.

49143209 is a deficient number, since it is larger than the sum of its proper divisors (3290359).

49143209 is a wasteful number, since it uses less digits than its factorization.

49143209 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22215.

The product of its (nonzero) digits is 7776, while the sum is 32.

The square root of 49143209 is about 7010.2217511288. The cubic root of 49143209 is about 366.2867178104.

The spelling of 49143209 in words is "forty-nine million, one hundred forty-three thousand, two hundred nine".