1799949 has 4 divisors (see below), whose sum is σ = 2399936. Its totient is φ = 1199964.

The previous prime is 1799929. The next prime is 1799951. The reversal of 1799949 is 9499971.

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.

It is not a de Polignac number, because 1799949 - 2¹² = 1795853 is a prime.

It is a D-number.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 1799898 and 1799907.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1799929) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 299989 + ... + 299994.

It is an arithmetic number, because the mean of its divisors is an integer number (599984).

2^1799949 is an apocalyptic number.

It is an amenable number.

1799949 is a deficient number, since it is larger than the sum of its proper divisors (599987).

1799949 is an equidigital number, since it uses as much as digits as its factorization.

1799949 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 599986.

The product of its digits is 183708, while the sum is 48.

The square root of 1799949 is about 1341.6217797874. The cubic root of 1799949 is about 121.6428910402.

It can be divided in two parts, 179 and 9949, that multiplied together give a palindrome (1780871).

The spelling of 1799949 in words is "one million, seven hundred ninety-nine thousand, nine hundred forty-nine".