1949998 has 4 divisors (see below), whose sum is σ = 2925000. Its totient is φ = 974998.

The previous prime is 1949947. The next prime is 1949999. The reversal of 1949998 is 8999491.

It is a semiprime because it is the product of two primes.

It is a Smith number, since the sum of its digits (49) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is an Ulam number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1949999) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 487498 + ... + 487501.

It is an arithmetic number, because the mean of its divisors is an integer number (731250).

2^1949998 is an apocalyptic number.

1949998 is a deficient number, since it is larger than the sum of its proper divisors (975002).

1949998 is an equidigital number, since it uses as much as digits as its factorization.

1949998 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 975001.

The product of its digits is 209952, while the sum is 49.

The square root of 1949998 is about 1396.4232882618. The cubic root of 1949998 is about 124.9332550339.

The spelling of 1949998 in words is "one million, nine hundred forty-nine thousand, nine hundred ninety-eight".