1949609 has 4 divisors (see below), whose sum is σ = 2052240. Its totient is φ = 1846980.

The previous prime is 1949581. The next prime is 1949627. The reversal of 1949609 is 9069491.

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, and also an emirpimes, since its reverse is a distinct semiprime: 9069491 = 977 ⋅9283.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1949609 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1949639) 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, 51287 + ... + 51324.

It is an arithmetic number, because the mean of its divisors is an integer number (513060).

2^1949609 is an apocalyptic number.

1949609 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

It is an amenable number.

1949609 is a deficient number, since it is larger than the sum of its proper divisors (102631).

1949609 is a wasteful number, since it uses less digits than its factorization.

1949609 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 102630.

The product of its (nonzero) digits is 17496, while the sum is 38.

The square root of 1949609 is about 1396.2839969003. The cubic root of 1949609 is about 124.9249469453.

The spelling of 1949609 in words is "one million, nine hundred forty-nine thousand, six hundred nine".