7491288243 has 4 divisors (see below), whose sum is σ = 9988384328. Its totient is φ = 4994192160.

The previous prime is 7491288223. The next prime is 7491288247. The reversal of 7491288243 is 3428821947.

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

It is not a de Polignac number, because 7491288243 - 2⁶ = 7491288179 is a prime.

It is a super-2 number, since 2×7491288243² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 7491288192 and 7491288201.

It is not an unprimeable number, because it can be changed into a prime (7491288247) 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, 1248548038 + ... + 1248548043.

It is an arithmetic number, because the mean of its divisors is an integer number (2497096082).

Almost surely, 2^7491288243 is an apocalyptic number.

7491288243 is a deficient number, since it is larger than the sum of its proper divisors (2497096085).

7491288243 is a wasteful number, since it uses less digits than its factorization.

7491288243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2497096084.

The product of its digits is 774144, while the sum is 48.

The square root of 7491288243 is about 86552.2284115204. The cubic root of 7491288243 is about 1956.6756297102.

The spelling of 7491288243 in words is "seven billion, four hundred ninety-one million, two hundred eighty-eight thousand, two hundred forty-three".