1949842753 has 4 divisors (see below), whose sum is σ = 2017078740. Its totient is φ = 1882606768.

The previous prime is 1949842717. The next prime is 1949842759. The reversal of 1949842753 is 3572489491.

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

It can be written as a sum of positive squares in 2 ways, for example, as 323172529 + 1626670224 = 17977^2 + 40332^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1949842753 is a prime.

It is a super-2 number, since 2×1949842753² = 7603773522853238018, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1949842753.

It is not an unprimeable number, because it can be changed into a prime (1949842759) 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, 33617950 + ... + 33618007.

It is an arithmetic number, because the mean of its divisors is an integer number (504269685).

Almost surely, 2^1949842753 is an apocalyptic number.

It is an amenable number.

1949842753 is a deficient number, since it is larger than the sum of its proper divisors (67235987).

1949842753 is an equidigital number, since it uses as much as digits as its factorization.

1949842753 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 67235986.

The product of its digits is 2177280, while the sum is 52.

The square root of 1949842753 is about 44157.0238240758. The cubic root of 1949842753 is about 1249.2993947018.

The spelling of 1949842753 in words is "one billion, nine hundred forty-nine million, eight hundred forty-two thousand, seven hundred fifty-three".