1949403 has 4 divisors (see below), whose sum is σ = 2599208. Its totient is φ = 1299600.

The previous prime is 1949383. The next prime is 1949417. The reversal of 1949403 is 3049491.

1949403 is nontrivially palindromic in base 9.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3049491 = 3 ⋅1016497.

It is not a de Polignac number, because 1949403 - 2⁵ = 1949371 is a prime.

It is a D-number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1949473) 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, 324898 + ... + 324903.

It is an arithmetic number, because the mean of its divisors is an integer number (649802).

2^1949403 is an apocalyptic number.

1949403 is a deficient number, since it is larger than the sum of its proper divisors (649805).

1949403 is an equidigital number, since it uses as much as digits as its factorization.

1949403 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 649804.

The product of its (nonzero) digits is 3888, while the sum is 30.

The square root of 1949403 is about 1396.2102277236. The cubic root of 1949403 is about 124.9205468416.

The spelling of 1949403 in words is "one million, nine hundred forty-nine thousand, four hundred three".