1954989 has 16 divisors (see below), whose sum is σ = 2946240. Its totient is φ = 1280880.

The previous prime is 1954987. The next prime is 1954991. The reversal of 1954989 is 9894591.

It is an interprime number because it is at equal distance from previous prime (1954987) and next prime (1954991).

It is not a de Polignac number, because 1954989 - 2¹ = 1954987 is a prime.

It is a Curzon number.

1954989 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1954987) 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 15 ways as a sum of consecutive naturals, for example, 1054 + ... + 2240.

It is an arithmetic number, because the mean of its divisors is an integer number (184140).

2^1954989 is an apocalyptic number.

It is an amenable number.

1954989 is a deficient number, since it is larger than the sum of its proper divisors (991251).

1954989 is a wasteful number, since it uses less digits than its factorization.

1954989 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1257 (or 1251 counting only the distinct ones).

The product of its digits is 116640, while the sum is 45.

The square root of 1954989 is about 1398.2092118135. The cubic root of 1954989 is about 125.0397526898.

It can be divided in two parts, 195 and 4989, that added together give a square (5184 = 72²).

The spelling of 1954989 in words is "one million, nine hundred fifty-four thousand, nine hundred eighty-nine".