7291861243 has 4 divisors (see below), whose sum is σ = 7292582280. Its totient is φ = 7291140208.

The previous prime is 7291861231. The next prime is 7291861259. The reversal of 7291861243 is 3421681927.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-7291861243 is a prime.

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 7291861243.

It is not an unprimeable number, because it can be changed into a prime (7291861223) 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, 345130 + ... + 365647.

It is an arithmetic number, because the mean of its divisors is an integer number (1823145570).

Almost surely, 2^7291861243 is an apocalyptic number.

7291861243 is a deficient number, since it is larger than the sum of its proper divisors (721037).

7291861243 is a wasteful number, since it uses less digits than its factorization.

7291861243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 721036.

The product of its digits is 145152, while the sum is 43.

The square root of 7291861243 is about 85392.3956977435. The cubic root of 7291861243 is about 1939.1562245377.

The spelling of 7291861243 in words is "seven billion, two hundred ninety-one million, eight hundred sixty-one thousand, two hundred forty-three".