1949409 has 48 divisors (see below), whose sum is σ = 3669120. Its totient is φ = 967680.

The previous prime is 1949383. The next prime is 1949417. The reversal of 1949409 is 9049491.

It is not a de Polignac number, because 1949409 - 2¹² = 1945313 is a prime.

1949409 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (1949459) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 20049 + ... + 20145.

It is an arithmetic number, because the mean of its divisors is an integer number (76440).

2^1949409 is an apocalyptic number.

It is an amenable number.

1949409 is a deficient number, since it is larger than the sum of its proper divisors (1719711).

1949409 is a wasteful number, since it uses less digits than its factorization.

1949409 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 150 (or 147 counting only the distinct ones).

The product of its (nonzero) digits is 11664, while the sum is 36.

The square root of 1949409 is about 1396.2123763955. The cubic root of 1949409 is about 124.9206750043.

The spelling of 1949409 in words is "one million, nine hundred forty-nine thousand, four hundred nine".