8749273949 has 4 divisors (see below), whose sum is σ = 9422295036. Its totient is φ = 8076252864.

The previous prime is 8749273927. The next prime is 8749273969. The reversal of 8749273949 is 9493729478.

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 4612854724 + 4136419225 = 67918^2 + 64315^2 .

It is a cyclic number.

It is not a de Polignac number, because 8749273949 - 2⁸ = 8749273693 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 8749273891 and 8749273900.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8749273969) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 336510524 + ... + 336510549.

It is an arithmetic number, because the mean of its divisors is an integer number (2355573759).

Almost surely, 2^8749273949 is an apocalyptic number.

It is an amenable number.

8749273949 is a deficient number, since it is larger than the sum of its proper divisors (673021087).

8749273949 is a wasteful number, since it uses less digits than its factorization.

8749273949 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 673021086.

The product of its digits is 27433728, while the sum is 62.

The square root of 8749273949 is about 93537.5536829994. The cubic root of 8749273949 is about 2060.5856528361.

The spelling of 8749273949 in words is "eight billion, seven hundred forty-nine million, two hundred seventy-three thousand, nine hundred forty-nine".