1949689 has 8 divisors (see below), whose sum is σ = 2240000. Its totient is φ = 1662336.

The previous prime is 1949657. The next prime is 1949707. The reversal of 1949689 is 9869491.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1949689 - 2⁵ = 1949657 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1949639) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 937 + ... + 2185.

It is an arithmetic number, because the mean of its divisors is an integer number (280000).

2^1949689 is an apocalyptic number.

It is an amenable number.

1949689 is a deficient number, since it is larger than the sum of its proper divisors (290311).

1949689 is a wasteful number, since it uses less digits than its factorization.

1949689 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1479.

The product of its digits is 139968, while the sum is 46.

The square root of 1949689 is about 1396.3126440737. The cubic root of 1949689 is about 124.9266556399.

The spelling of 1949689 in words is "one million, nine hundred forty-nine thousand, six hundred eighty-nine".