1949810249 has 4 divisors (see below), whose sum is σ = 1953311364. Its totient is φ = 1946309136.

The previous prime is 1949810237. The next prime is 1949810251. The reversal of 1949810249 is 9420189491.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 9420189491 = 547 ⋅17221553.

It can be written as a sum of positive squares in 2 ways, for example, as 1176970249 + 772840000 = 34307^2 + 27800^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1949810249 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1949810749) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1749722 + ... + 1750835.

It is an arithmetic number, because the mean of its divisors is an integer number (488327841).

Almost surely, 2^1949810249 is an apocalyptic number.

It is an amenable number.

1949810249 is a deficient number, since it is larger than the sum of its proper divisors (3501115).

1949810249 is an equidigital number, since it uses as much as digits as its factorization.

1949810249 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3501114.

The product of its (nonzero) digits is 186624, while the sum is 47.

The square root of 1949810249 is about 44156.6557723748. The cubic root of 1949810249 is about 1249.2924526970.

The spelling of 1949810249 in words is "one billion, nine hundred forty-nine million, eight hundred ten thousand, two hundred forty-nine".