1949140209 has 8 divisors (see below), whose sum is σ = 2635457472. Its totient is φ = 1281124880.

The previous prime is 1949140201. The next prime is 1949140217. The reversal of 1949140209 is 9020419491.

It is an interprime number because it is at equal distance from previous prime (1949140201) and next prime (1949140217).

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

It is a cyclic number.

It is not a de Polignac number, because 1949140209 - 2³ = 1949140201 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1949140201) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4575234 + ... + 4575659.

It is an arithmetic number, because the mean of its divisors is an integer number (329432184).

Almost surely, 2^1949140209 is an apocalyptic number.

It is an amenable number.

1949140209 is a deficient number, since it is larger than the sum of its proper divisors (686317263).

1949140209 is an equidigital number, since it uses as much as digits as its factorization.

1949140209 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9150967.

The product of its (nonzero) digits is 23328, while the sum is 39.

The square root of 1949140209 is about 44149.0680422588. The cubic root of 1949140209 is about 1249.1493324765.

The spelling of 1949140209 in words is "one billion, nine hundred forty-nine million, one hundred forty thousand, two hundred nine".