1868949 has 6 divisors (see below), whose sum is σ = 2699606. Its totient is φ = 1245960.

The previous prime is 1868947. The next prime is 1868983. The reversal of 1868949 is 9498681.

It can be written as a sum of positive squares in only one way, i.e., 1306449 + 562500 = 1143^2 + 750^2 .

It is not a de Polignac number, because 1868949 - 2¹ = 1868947 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1868947) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 103822 + ... + 103839.

2^1868949 is an apocalyptic number.

It is an amenable number.

1868949 is a deficient number, since it is larger than the sum of its proper divisors (830657).

1868949 is a wasteful number, since it uses less digits than its factorization.

1868949 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 207667 (or 207664 counting only the distinct ones).

The product of its digits is 124416, while the sum is 45.

The square root of 1868949 is about 1367.0950954487. The cubic root of 1868949 is about 123.1778114381.

The spelling of 1868949 in words is "one million, eight hundred sixty-eight thousand, nine hundred forty-nine".